Now that I'm thinking about it: you could just limit a connection to ~30mbit permanently and remove any data limit.
30mbit is enough to stream 4K video, so there is currently no actual use-case for more bandwidth on mobile devices. Those who are 'abusing' the unlimited plan to replace their wired internet connection at home will now have a choice: 30mbit 'slow' internet from their mobile plan, or get a separate fiber/cable/adsl line for more bandwidth.
The base stations are very much capable of sharing their available bandwidth equally through TDM, so it wouldn't impact other users that much.
I think it's unreasonable to assume that streaming is the only use-case of a high-speed connection. If I need to download something large, there is no upper limit to the bandwidth I can benefit from.
More generally, I think claims that there's no valid use-case of X are essentially always wrong. It's fine not wanting to provide a service if you're upfront about it, but framing it as anyone who does this is doing something dodgy is just a way of diverting blame.
30mbit is huge though. For plenty of people 30mbit would be faster than their home internet connection, especially if they're allowed to tether unlimited devices behind it.
30mbit is enough to stream 4K video, so there is currently no actual use-case for more bandwidth on mobile devices. Those who are 'abusing' the unlimited plan to replace their wired internet connection at home will now have a choice: 30mbit 'slow' internet from their mobile plan, or get a separate fiber/cable/adsl line for more bandwidth.
The base stations are very much capable of sharing their available bandwidth equally through TDM, so it wouldn't impact other users that much.
Again, I'm probably being naive here...