Stable?? Linux is a rock of stability, you must mean something else.
I would love a Linux daily driver but I've had similar experiences to the above every time I've tried it for the last 15 years.
It says use it for non-GUI newest release upgrades? Why are you surprised the GUI disappeared?!
Also, why did to do that, if you wanted to keep the current version?
Anyhow, I never have such issues with Debian. Do bear in mind, Ubuntu(or any distro) is not Linux.
Are you going to call Linux "unstable", because you get a crappy phone with Android(which is judt more Linux).
Or non-Ubuntu, software just randomly falling apart after 2 years. Like I need a newer kernel for a new Wi-Fi card but then I need a different GPU driver and that’s incompatible with some softwares UI library, so they update that but it has an incompatibility with something else.
Or how Linux still has Wi-Fi 6 totally broken.
Sure, Linux is rock stable if you have a production environment where everything is nailed down. But from an actual daily consumer user point of view it doesn’t feel stable. At all.
I love Linux. I love fixing it when it borks. But my god does it break every week.
Don't blame the good, for the things bad does.
I go months on my Debian desktop without issues, through upgrades, and only reboot for kernel updates!
Howver, whatever crazy-stable and easy to use and well supported hypothetical Linux this is wouldn’t be compatible with my “real” Linux use cases so I would then also install Arch or whatever and live with constantly borked everything and just swap between my Arch “Dev” OS and my “Linux Mac” business/work/consumer OS.
Current Linux cannot be made “MacOS”-stable. But maybe in 5 years.