There isn’t even a real photoshop competitor in the broader market, but you want to further split the hobbyist devs effort on linux as well?

I think instead it would be better to focus all the effort on a single solution that strives to cover all of photoshops features, with at least equal or better usability. Like has been done with Blender and godot for example. (And GIMP is sadly faaar from it still)

Darktable

I am pretty sure it would run in the same wine setup, but nobody bothered to set it up as an install script yet, so you’d need to do some manual dirtywork.