> bringing my mouse to the edge of a screen
Doesn't work on Linux.
The keyboard is great, but you have to physically pick up the mouse and press a button on the bottom.
It's way easier to just have 2 or 3 mice at $100.
Switching to bluetooth has a seconds long delay. Regular wireless is instant.
Android apps (not the YouTube app, but definitely jellyfin and some others) tend to shit themselves when you connect the MX keys via Bluetooth.