My counter to this is that I've been using GIMP for what seems like two decades, it's what I'm familiar with and I'm much faster using that than other programs.

My counter to this is that I've been using GIMP for what seems like two decades, it's what I'm familiar with and I'm much faster using that than other programs. I preferred Corel Draw when I used that, but hated Photoshop (for some reason it was all wrong, perhaps because I started on GIMP; but it was pretty much GIMP or nothing at the time [due to cost]). Krita has a lot going for it, and starting now I'd probably use that (with Inkscape for my needs); but I'm still more comfortable with GIMP and thankful for it.