> Microsoft advanced the state of UI and UX more than anyone else in the '90s.
There is no universe where that is true.
And the contemporaneous counterexamples are what? The various UNIX windows managers and X11? System 6-8 on the '90s Macs? None of those were great UI/UX IMO.
There is: this one.
Win95's UI was so incredibly influential that stuff introduced by it are still around to this day.