I've used GIMP sparingly but the tools pane/window gets lost, it's a clumsy interface. Krita is nice (except GIMP has some nice GNOME-ish human interface touches that are better.)
I can't explain how but my tools pane was lost when I opened GIMP to inspect it during my previous comment (not visible and Tools menu -> show tools did not make it show up). Now, resetting tools window locations (in settings) did fix it. But it explains my confusion and exasperation the last few times using GIMP. (version 2.10.x)