[hulitu]

> Most of this was also hidden by Qt abstractions, and toward app/shell devs most certainly by further KDE library abstractions. Directly interacting with X11 was an almost-never occurence.

How do you think Qt draws on the screen ?

[Bjartr]

Right, but Qt abstracts that interaction so KDE code doesn't have to care about it. The person you're replying to never implied X11 wasn't involved, just that it was abstracted away.