I ran the back of the napkin math on this for my org (US local government). Not really possible unless you’re just doing office work. Microsoft is so deeply ingrained in govtech that you can’t even shrink your footprint. That’s not even counting the political and cultural buy-in before you start the lift.

I actually got a spam call from myself once. They spoofed my own number. Got a bunch of followup calls, voicemails, and texts for a month or so after that.