Earlier quoted context omitted.
Personally I've found GIMP's UI to be easier than Photoshop's, but I started out with the GIMP. I wonder if maybe they shouldn't go with a XUL like system where the UI can be greatly customized by third parties. Someone would undoubtedly create the Photoshop clone UI and make a bunch of people happy.
That's how GTK ( The GIMP Toolkit ) started, isn't? I'd rather have them focus on GIMP's core features, maybe UI enhancements, but certainly not on platform-building. Edit: or rather, create a SketchUp clone with good 2D projection/export (Blender isn't for casual use)
Back when the GIMP was developed your options were pretty limited. There was Athena Widgets which are basically the cave drawings of the computer world. Motif which had licensing issues. OpenWindows widgets which were notoriously buggy and ugly. There wasn't much else to choose from. There's a reason GTK exploded so quickly after release.