Also, I wonder if Jedi Knights and Jedi Masters were meant at one point to have different robes - Jedi Knights wearing black jumpsuits suitable for combat, and Jedi Masters wearing longer samurai-style robes in light earth tones. Like how ordinary Lensmen wear the space-black and silver uniforms of the Galactic Patrol fleet, but the higher-ranking Gray Lensmen wear gray leather flight suits.
That would’ve been a nice compromise and certainly far better than what the PT went with.
Still, that begs the question: Was Obi-Wan even supposed to be a Jedi master during the production of the OT? He wields a lightsaber, after all.