--- title: DHH has gone completely off the rails... | daily.dev description: A satirical commentary breaks down DHH's Rails World keynote in which he declared hand-written code economically dead, revealed the Hey email app is being... canonical: https://daily.dev/posts/dhh-has-gone-completely-off-the-rails--rvo54shm1 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: DHH has gone completely off the rails... | daily.dev og:description: A satirical commentary breaks down DHH's Rails World keynote in which he declared hand-written code economically dead, revealed the Hey email app is being... og:url: https://daily.dev/posts/dhh-has-gone-completely-off-the-rails--rvo54shm1 og:image: https://api.daily.dev/og/posts/Rvo54Shm1.png og:image:alt: DHH has gone completely off the rails... og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # DHH has gone completely off the rails... **[Fireship](https://daily.dev/sources/fireship)** · 6 min read · 36 upvotes · 3 comments ## Summary A satirical commentary breaks down DHH's Rails World keynote in which he declared hand-written code economically dead, revealed the Hey email app is being rewritten from Ruby on Rails to AI-generated Rust with a claimed 95% cut in CPU and memory usage, and urged developers to embrace AI agents rather than obsess over editors, keyboard shortcuts, or frameworks. The video mocks the hype while arguing that mechanical coding skill was never as valuable as problem definition and system design, questioning why mass layoffs haven't followed if coding is truly dead. It closes with a sponsored pitch for CodeRabbit's PR triage tool. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### why is DHH rewriting the Hey email app in Rust instead of Ruby on Rails DHH announced at Rails World that the Hey email app backend is being rewritten from Ruby on Rails into AI-generated Rust, with the AI writing the Rust code rather than humans. He reported the rewrite cut server CPU and memory usage by 95%, framing it as proof that performance and low token cost now matter more than the developer happiness Rails was originally designed around. _Anyone weighing a Rails to Rust migration can track real framework performance debates on daily.dev._ ### is Ruby on Rails dying because of AI coding tools Ruby on Rails is not dead, but its creator DHH publicly argued at Rails World that hand-writing Rails code by hand is no longer economically viable, saying he went from writing about 30,000 lines of Ruby per year to roughly 150,000 lines per month using AI agents. He also polled 1,200 attendees and found fewer than 1% still spend meaningful weekly time writing code by hand. _Developers deciding how much to invest in Rails skills versus agent workflows can follow the debate on daily.dev._ ## Community discussion Top comments from developers on daily.dev. **@rawo** · 3 upvotes > For me this DHH rant makes no sense. Those people are feeding on crowd reactions. They are attention whores. Just stop listening to those preachers and stop making them famous. Let them just talk and then 'oh, anyway' and move on. **@random\_user** · 3 upvotes > DHH also went off the rails in the racism, xenophobia, transphobia, and white supremacy way. He's always been a narcissist, but in the last few years he's gotten a lot more open about his very problematic views. **@baz14** · 0 upvotes > Coding became dead when the first IDE/lib/framework, appeared😉 The desire to automate and simplify communication with the computer began with assembly language. High-level languages are only proof of this 🤷 > > If you love coding, write in binary 🤣🤣🤣 --- Tags: [#rust](https://daily.dev/tags/rust), [#ai-coding](https://daily.dev/tags/ai-coding), [#rails](https://daily.dev/tags/rails), [#code-review](https://daily.dev/tags/code-review) [View this post on daily.dev](https://daily.dev/posts/dhh-has-gone-completely-off-the-rails--rvo54shm1) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"DHH has gone completely off the rails...","url":"https://daily.dev/posts/dhh-has-gone-completely-off-the-rails--rvo54shm1","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/dhh-has-gone-completely-off-the-rails--rvo54shm1"},"datePublished":"2026-09-28T19:30:25.625Z","dateModified":"2026-09-28T22:04:15.677Z","description":"A satirical commentary breaks down DHH's Rails World keynote in which he declared hand-written code economically dead, revealed the Hey email app is being...","image":"https://i.ytimg.com/vi/OuNKBjuV7A4/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/OuNKBjuV7A4/sddefault.jpg","isAccessibleForFree":true,"articleSection":"Fireship","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Fireship","logo":"https://media.daily.dev/image/upload/s--75ndqrkr--/f_auto,t_logo/v1702882094/logos/fireship.jpg","url":"https://daily.dev/sources/fireship"},"commentCount":3,"discussionUrl":"https://daily.dev/posts/dhh-has-gone-completely-off-the-rails--rvo54shm1","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":36},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":3}],"keywords":"rust,ai-coding,rails,code-review","timeRequired":"PT6M","video":{"@type":"VideoObject","name":"DHH has gone completely off the rails...","description":"A satirical commentary breaks down DHH's Rails World keynote in which he declared hand-written code economically dead, revealed the Hey email app is being...","thumbnailUrl":"https://i.ytimg.com/vi/OuNKBjuV7A4/sddefault.jpg","uploadDate":"2026-09-28T19:30:25.625Z","duration":"PT6M","url":"https://api.daily.dev/r/Rvo54Shm1","embedUrl":"https://www.youtube.com/embed/OuNKBjuV7A4"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Fireship","item":"https://daily.dev/sources/fireship"},{"@type":"ListItem","position":3,"name":"DHH has gone completely off the rails..."}]} {"@context":"https://schema.org","@type":"WebPage","@id":"https://daily.dev/posts/dhh-has-gone-completely-off-the-rails--rvo54shm1","comment":[{"@type":"Comment","text":"For me this DHH rant makes no sense. Those people are feeding on crowd reactions. They are attention whores. Just stop listening to those preachers and stop making them famous. Let them just talk and then ‘oh, anyway’ and move on.","datePublished":"2026-10-01T07:21:58.959Z","url":"https://daily.dev/posts/Rvo54Shm1#c-9L0G3YUgE","author":{"@type":"Person","name":"Rafał","url":"https://daily.dev/rawo","image":"https://lh3.googleusercontent.com/a/AAcHTtcaYq_zljnMUiPVEnx39HGk2tCY15VnYppfSjB74ef23UM=s96-c"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":3}},{"@type":"Comment","text":"DHH also went off the rails in the racism, xenophobia, transphobia, and white supremacy way. He’s always been a narcissist, but in the last few years he’s gotten a lot more open about his very problematic views.","datePublished":"2026-10-01T21:34:15.018Z","url":"https://daily.dev/posts/Rvo54Shm1#c-r5XLPqubD","author":{"@type":"Person","name":"Joshua Jarman","url":"https://daily.dev/random_user","image":"https://media.daily.dev/image/upload/f_auto/v1632349791/avatars/f857f24c9be64a05bcc33d248c2e9b23"},"interactionStatistic":{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":3}},{"@type":"Comment","text":"Coding became dead when the first IDE/lib/framework, appeared😉 The desire to automate and simplify communication with the computer began with assembly language. High-level languages are only proof of this 🤷\nIf you love coding, write in binary 🤣🤣🤣","datePublished":"2026-10-03T09:55:15.067Z","url":"https://daily.dev/posts/Rvo54Shm1#c-WK2k9rCwD","author":{"@type":"Person","name":"Baz","url":"https://daily.dev/baz14","image":"https://lh3.googleusercontent.com/a/ACg8ocKd2iFU8YS4sV-rBJptuYSF8EHeQnm23N_dcXE1uON7_GMIlZg=s96-c"}}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/dhh-has-gone-completely-off-the-rails--rvo54shm1#faq","mainEntity":[{"@type":"Question","name":"why is DHH rewriting the Hey email app in Rust instead of Ruby on Rails","acceptedAnswer":{"@type":"Answer","text":"DHH announced at Rails World that the Hey email app backend is being rewritten from Ruby on Rails into AI-generated Rust, with the AI writing the Rust code rather than humans. 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