A big "Yes" to proportional scroll bars. I didn't have an Amiga, but rather an ST. The ST also had proportional scroll bars and for years, I could not understand why the major platforms (Windows, MacOS) did not. It was a pet peeve that really bothered me when I would sit down to use someone's Mac or PC of the time.
I should have realized it could be worse. With the modern era's "mobile first" UX regime, we now have many desktop experiences that hide the scrollbars entirely—revealing them only on interaction—wholly removing any at-a-glance utility we enjoyed from proportional bars.
I should have realized it could be worse. With the modern era's "mobile first" UX regime, we now have many desktop experiences that hide the scrollbars entirely—revealing them only on interaction—wholly removing any at-a-glance utility we enjoyed from proportional bars.