Subgraph OS, now there’s a name I haven’t heard off in a long time.
Honestly, I would take someone’s advice with a pinch of salt if they seriously recommend it in 2025 and beyond. IF they recommend it, their knowledge is either lacking, or they have been out of the game for a long time. The project has been dead for like 6 years by now, and activity has flatlined about 4 years ago.