Auto hiding scrollbars and useless online help even when you don't have an Internet connection. Ah, and gray on gray, 1px borders and usage of titlebars as window content. And Automatic Updates, Automatic Restarts, Automatic Encryption (they know the key), Automatic ID ( you are a good citizen and don't want to make anything stupid).

Every click, keyboard tap, and peripheral event, are now logged and (most) of those are then sent back to Microsoft.

With Windows' socket-hogging, its a miracle they can be this invasive and only use that much RAM.

The same question could be asked about modern Linux distros versus 1990's.

The architecture has been changed fundamentally. AFAIK the old windows 2000 had flaws beyond repair. On the other hand the UI overlay build on UI overlay built on UI overlay, making everything a html page etc was terrible direction