Just as an exMple I'm on arch myself and after last update if I use X11 screen saver with lock some service crashes and the computer cannot be unlocked.

Maybe next update will have a fix but then something else will be broken instead.

Linux (as in the kernel+user space of your choice) is a perpetual alpha. Has been for 30 years and will always be.

Whenever GTK/Gnome becomes reasonable stable it's time for a rewrite!

(And I'm a Linux user since red hat 7.2)