[jeroenhd]

I have talked to plenty of people for which Krita was their preferred Photoshop replacement.

Photoshop does a lot of advanced editing well, but that's a feature many professionals don't really need. It's a bit like Excel: whole companies have moved from Excel to Google Docs, but many companies will never be able to use anything else because only Excel manages to render their VBA-sheet-database monstrosities correctly.