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I recommend everyone to watch some BW episodes and look at the animation. If you ignore the constant stock fotage you will see that very often it is way more fluid than what we have now for some reason. Strange.
For example compare Ash vs Clay and Ash vs Bisces or Bea. All directed by Iwane. If you showed both to a person which never saw the anime past OS he would claim for sure that the Clay one is more recent.