Windows 8 was the single biggest change in all of Microsoft UI history, and even then they didn't actually change any of the most important parts. All windowing operations are still based on IBM CUA and... work like dogshit.
Every single Windows version has the same problem, some things just won't multitask. If you try to drag an Edge window while the browser is opening a tab, you can't. That's because the application is responsible for that. On Unix systems this isn't a thing because the Window Manager is responsible.
What's especially frustrating about this is that Windows actually has some cool UI features like detecting when you're connecting to some displays you've connected to before, and arranging them logically the way you had them arranged before. But then the process fails as Windows forgets which windows were maximized, or the application doesn't restore to the same size window it had before because of some weird interaction. So Windows has this awesome feature... which doesn't actually work. I still have to rearrange my windows every time because they do actually do it, but they do it incorrectly.
But with that said Windows has never, ever, EVER changed the basic way Window management has functioned since Windows 3.0. It is still basically the same, the only significant difference is where minimized windows go.
