Interplanetary distances. My usual use case is editing 16k hdri's. Gimp can't do this, it simply crashes or grinds to a halt. I also spend a lot of time creatin

Interplanetary distances. My usual use case is editing 16k hdri's. Gimp can't do this, it simply crashes or grinds to a halt. I also spend a lot of time creating textures with filters. Gimp can't do this. Even editing a 4k texture barely works. Also digital painting sucks, tablet recognition is still terrible, and the UI is even worse than Photoshop's, which takes genuine, conscious effort and work on the part of the devs. The docs almost always show examples from several versions back with a different interface making them functionally useless. And it crashes. All. The. Time. Even for ordinary photo retouching the experience is just worse. Now darktable is a decent opensource alternative for Lightroom and parts of Photoshop for photo adjustment and if your aim is to make your photos look good rather than heavily manipulate them I would go with that. Krita is also ok for digital painting, although it has its issues.