Hello, i am currently looking for a Linux distribution with these criteria:
-it should be more or less stable, comparable to Ubuntu with or without LTS //
-it should not be related to IBM to any way (so no fedora/redhat) //
-it should not feature snaps (no Ubuntu or KDE neon) //
-KDE plasma should be installable manually (best case even installed by default) //
-no DIY Distros //
I've been thinking about using an immutable distro, but if anyone can recommend something to me, I'd be very grateful //
Edit: I'm sorry for the bad formatting, for some reason it doesn't register spaces
Try OpenSuse Tumbleweed. Very stable from my experience, ships with KDE that can be installed during the installer, and its file system is BTRFS which automatically takes snapshots so if a system update ever breaks your install which is not common on OpenSuse, you can just roll it back to an older snapshot and boom your system is all good again.
In addition, if you don't want to go the rolling release route, there's OpenSUSE Leap (which is transitioning to ALP), as well as at least one immutable option if that's more your thing.