Two things: 1) missing apps. Recent examples are 1password having a browser extension but no desktop client and I use several browser profiles, which results in me having to enter my 1password over and over again. Claude and OpenAI desktop apps missing. There are other more esoteric/personal ones of course, but those were the most annoying. 2) installing stuff is still a disaster. I most recently used PopOS and a mainstream app like Slack suggested Snap install, and I didn't have the Snap store. So I installed that and Slack installed but didn't work. Ended up installing the rpm instead which worked, but then the Snap Slack instance started working. So now I have two Slacks running and no idea which is which.

Yes, I'm a "noob" but like I said I have been doing this for 20 years. Have been a fulltime CTO for most of those years. Do server side linux admin fairly regularly as well.