1. Sometimes when I select the titlebar of a maximized window to move it to my second monitor it somehow selects the window under the one with focus.
2. For some applications (including MS Office ones) text is blurry when I move from laptop screen to external monitor.
4. Windows 10 ships with a python.exe in the path that opens the MS Store. Figuring out which part of the path to fix to disable it was non-obvious.
5. VirtualBox is broken because of some Hyper-V settings. I still haven't figured out how to fix this one.
MS somehow shipped an OS with problems I've never seen before in any OS...
The first time I did an upgrade from 7 to 10 and I saw the horrible anti-patterns in the "opt-in" screens, I shut it down and switched to Debian Buster. No looking back.