The better multi-monitor support is just hilarious. Windows had perfectly fine multi-support monitor until they totally screwed it up in Win 8 and 10. Then getting back to something a bit better is sure a tremendous achievement!
Multi-monitor support on older Windows versions always sucked donkey balls, it only "fine" if your requirements were little more than just having two identical monitors side by side with no change.
The first version where transition between multiple states without reboot was even supposed to work was Windows 7, but in reality it simply just didn't. If you were lucky you could connect an external display and it would be identified correctly, most of the time any alterations would be gone, and when disconnecting and reconnecting displays open apps had to be manually reshuffled.
The latter was supposed to be solved in Windows 10, just that it wasn't.
In Windows 11, that finally works fine now as it did for years on macOS. On the tablet/convertible I have, I can now seamlessly change between tablet mode, laptop mode and docked mode (docking station with additional monitor), and not only detects Windows 11 the mode correctly but it also restores all the app windows as they have been set for each mode.
Also, not having to deal with the shitshow that was the Windows 10 split UI (a poor one for desktop mode and another, truly crap one for touch mode) is a godsend on a tablet/convertible.