Microsoft in the 90s was doing things that hadn't been done before with Windows. And the NT line, converging to consumers at XP, solved many of them, and by now they don't have an excuse any more.
Not the first gui.
Not the first web browser.
Not the first spreadsheet/word processor/slideshow.
Edit: I’ll give credit, NT is good kernel, and had some novel qualities.
Microsoft tried to do everything for better and worse on wildly varied commodity hardware.
It's a far cry from the current chaotic chimera of elements and themes that make up windows 11.