A developer builds a fictional Space Mission & Satellite Explorer app to stress-test React DataGrid, a free open-source data grid library with an AG Grid-style enterprise edition. The project uses a 1,200-row client-side dataset and a 100,000-row live archive loaded via server-side infinite scrolling, exercising features like multi-column sorting, faceted filtering, row grouping and pinning, a pivot table builder, custom cell renderers, CSV/Excel export, and Tree Data for hierarchical mission timelines. Alongside the Explorer, a chart-driven Analytics page and a Mission Details page round out the app. The writeup covers setup, developer experience, theming, and concludes that React DataGrid is worth using for data-intensive dashboards, analytics tools, and applications needing large datasets or hierarchical data, though the Pivot Table and Tree Data configuration took more time to learn than basic sorting and filtering.