Distrobox is like a package manager for distros that runs on top of your distro, and I love it

Distrobox is a Linux tool that lets you run any Linux distribution as a container on top of your existing distro, treating distros like installable packages. Each container has its own isolated filesystem and package manager, making it easy to access software only available on other distros (like AUR packages on Ubuntu) or maintain separate development environments with different tool versions. It runs with near-native performance since containers share the host kernel, unlike full VMs. A GUI frontend called DistroShelf is also available via Flathub for those who prefer not to use the terminal.