What OS do you use on your pc and why?

My main personal computer is a macbook with apple silicon. I use "Mac OS X" since the inital Public Beta - and man i miss the PPC days... - but i also use MorphOS daily (Mac Mini G4) and Linux/SteamOS in for personal computing in its dock from time to time. macOS has still the best UX for me - i still hope it will return to a more desktop and less mobile UX/UI like in the 10.4 - 10.14 days... SteamOS works just awesome for a Linux and is very polished compared with for example a stock debian installation imho