If this happens, will it be a mass exodus to Linux/Mac? Or will people just live with it? The fact that the Steam Deck has shown great promise in playing games on Linux has made me reconsider Windows yet again.
I mean, you don’t have to use Edge, any modern browser should work. I use Brave mainly, and have not had any issues with O365. You can use OneDrive on the browser, but even if you want it synchronized to your desktop there’s a few ways to sync it to Linux:
https://github.com/jstaf/onedriver#readme - FOSS with GUI
https://github.com/abraunegg/onedrive#readme - FOSS CLI (but there is a GUI for it, and a System Tray icon if desired)
https://www.insynchq.com/linux - Proprietary commercial product