In terms of stability and packages, it’s an amazing OS. Gone are the days of being afraid that of updates or system upgrades that might leave your system borked. Unless you’re experimenting with filesystems and boot parameters, it’s not straightforward to fuck things up.
On the flipside, by Linus is it difficult to get things working as a beginner. Good luck packaging new stuff, good luck creating new options, good luck cross-compiling, good luck configuring stuff with hardcoded config paths in /var/ or whatever, actually good luck understanding how to configure existing packages, good luck getting any kind of PR merged without the say-so of a chosen few, good luck changing anything in the community without getting past the gatekeepers, and have fun understanding why some random package is being installed and/or compiled when you switch to a new configuration.