Blender has been converging more towards industry standard UX practices, while GIMP sticks to its tried and true idiosyncratic way of doing things. It’s good GIMP exists, but it’s a failure in the sense of that it remains a programmers idea of what an UI should be. GIMP could have a had a lot more uptake if it wasn’t so stubborn. Something the folks at Blender understood at some point.
Management of Blender by Ton Roosendaal has been really good.