I must have used KDE for close on two decades, from the 3.x days onwards. I seem to remember I ran Suse for a long time as it seemed to be the best distro for using with KDE.
About eight years ago I wanted to try a tiling window manager, ended up settling on Awesomewm and still with it today, but I still use Dolphin as I've found no other file manager compares. (Or maybe I'm just too comfortable with it to change.)
Also still use Konsole, but honestly, as soon as Ghostty or similar implement being able to switch tabs in MRU order instead of round-robin I'll jump.
I have a low-priority todo to give Cosmic, Hyprland and Niri a go at some point. Would be nice to go back into a fuller desktop experience over what I've cobbled together around "just" a window manager.