In our area there is a 900 MHz (902-928 band) repeater. There is also an Internet service provider using 900 MHz Part 15 equipment (trying) to make money. We have priority but but what happens when an HT kills service to an apartment building , even service unwisely using frequencies the law does not protect?
And some folks want to use Part 15 for control and monitoring of the electric grid. That's as wise as dispatching ambulances by CB!
There are a LOT of such uses. In another venue, a post notes:
That's not the number of stations; it's the number of kinds of equipment approved to be sold.a search on the OET's site for devices that operate on the 902-928 MHz band in the US equal...wait for it...nine thousand six hundred and fifteen different devices!