Last time i used KDE for a significant amount of time, something was distracting. Then i realized what it was: the "system tray" icons were erasing themselves and then got redrawn one by one and readjusted their position with each redraw. Distracting as hell when you're trying to concentrate on the code in a nearby window.

Mind, that was in 2013, and hopefully KDE has improved since then. Perhaps it has even reached the level KDE 3 was at? It's been downhill from there.

Btw, I switched to Macs from running Linux with KDE as my desktop of choice full time.