Dataloss is never fun. File systemet in general need a long time to iron out all the bugs. Hope it is in a better state today. I remember when ext4 was new and crashed jag n a laptop. Ubuntu was to early to adopt it, or I did not use LTS.
But as always, make sure to have a proper backup on a different physical location.
Kde because i want customization and standard is also ok. I tried gnome but did not like that extensions were required for tray icons etc. Gnome is otherwise good.
I3 and hyperland i dont get. Some windows should not be very large no matter how much free screen space you have. Example is calculator or old school chat applications like pidgin. No native standard set of applications. Everything must manually be added and custom, like everything in kde settings(sound output, network settings, screen size etc). Waiting for when applications can recommend its screen size to the window manager.