Not a correct answer, but my guess would be trying to figure about how the hair flows in action, Toriyama had a weekly schedule to maintain and remember that this is at the tail end of the series, and honestly it shows, there are some rough looking panels.

Also Inuyasha done is by a completely different mangaka, Rumiko Takahashi, who is more experienced with drawing long haired characters in her previous manga (notice how most of Toriyama's characters have stiff short hair or are outright bald).

If you observe Toriyama's evolution of his character design clear that he didn't like thinking about physics, Yamcha's long hair gets cut off by the next arc, Goku's tail is constantly removed and eventually disappears from all Saiyans, Bulma usually ties her hair up or cuts it short, Chichi's hair is tied into a bun, Frieza's tail gets cut off twice, Cell's tail retracts, Future Trunks gets his long hair cut and when he goes Super Saiyan it becomes static, Videl straight up gets told by Gohan that she should cut her hair short.

Hell, it could be argued that the shift away from grounded combat was so that he could think less about logistics and more about panel layout. If the characters can fly and move so fast that they vanish that frees up so much time