So true, that was once something you could count on from any mature application that had much of any UI to speak of. We took for granted that
because it was a computer, of course almost everything can be customized. That was a lot of what was exciting about computers.
Today everything (web, mobile app, desktop) is converging toward "One lazy UI, optimized for aesthetics, riddled with junk drawers ( ••• buttons) and static" -- except not really static since the whole UI is ripped and replaced every 18 months or so to capitalize on some trend or because a new "UX designer" came to power.