[garciansmith]

"When dragging files to another location on the same disk using Dolphin or the Plasma desktop, you can now have the system always move the files, rather than being asked what to do every time."

The default behavior of the file manager (always asking if you want to move or copy the files) might have been the only quirk that took some getting used to when I first started using KDE a few years ago. In the end I got used to it, even prefer it (you can hold shift or control while dragging to automatically move or copy), but it's nice that it's configurable now.