@leocg There are no laws of course. But it's pretty obvious reading threads posted on almost any bit of software offered by anyone that user customization is popular. One would wonder why anyone would buck this preference.
And especially, since the PC/Mac is not extinct, one would wonder what appeal a razor-thin scrollbar that cannot be customized would have, unless one liked aggravating people, I guess. 🙂
I could understand, if a developer was thick enough to believe that everyone used a phone, thus screen real estate is ultra valuable, and PC/Mac users ... well, the heck with them.