that's because back in the day, DBZ was TOEI top priority in their budget animation, like they outsourced on many animation studios, unlike when DBS is released, there's One Piece which is they current main priority for over a decade, which is makes their inhouse animation and outsourced animation staff very much occupied
@@yorknew423 that's exactly what is happening, both production suffer in quality as a result, because animators either they are divided or they have more work to do more than they can handle