I recently switched from being a long time GNOME user over to KDE Neon. It has been a nearly flawless experience.

My biggest complaint so far is the lack of NFS support in Dolphin, which I use for my NAS. GNOME Files had native support for NFS. Now I have to manually mount from CLI and then it’ll show up in Dolphin (eventually I’ll setup fstab, but haven’t done it yet).