I don’t do photo editing (Gimp) or drawing (Krita) but I have followed many aggregated blogs such as Planet KDE, etc over the years.
I got the feeling that most people have a hard time moving or transiting to Gimp. I have seen some posts from people who love Gimp but they seem to be a miniority. On the other hand, I got the feeling the drawing community love Krita and think it’s worth learning. Krita even shows up in unexpected places such as Godot tutorials on YouTube.