I think we forget that for a lot of it he also just “changed his mind”.
Like light sabers, originally, were hard to control. They were “heavy” and difficult to wield. Which is why Luke used two hands when fighting and the battles were fairly stiff and slow.
Now that everyone had a lazer sword, and you had actors not hindered with hard to see helmets, and advances in fight choreography, that we got to see Jedi and SIth whip around like they were light rapiers.
Later this was “cleaned up” some explaining that Luke used a particular style of fighting, and to people not one with the force, using light sabers was extremely difficult and “heavy”.
