Depends on what you need, I have Calibre Web and Audiobookshelf on RPi 3B

I do and find it stable and comfortable, but for most those two things make it boring i suppose :D

OS is pretty hard, Prusa is moving away from OS and I wouldn’t consider them fully OS anymore. There are a lot of good projects around Voron community and I think RatRig is OS, but apart from that I don’t think there is a big OS project alive anymore. Saying that, there is a shitton of smaller projects, not full 3d printers, but motion solutions, extruders, electronic solutions, filament swappers and such, everything you need to build a 3d printer yourself.

I’m going to watch that conversation. I’m currently on Pixel and I’m considering Graphene among others, but the main thing that gets me worried are updates, especially security updates. RCS, banks, most of the apps - I can work around, 0d exploits I cant.