I cannot see governments in the tropics allowing C band 5G, C band VSAT is the only satellite technology that works when it rains heavily.
It might also affect reporting/news services. I've not been keeping up with broadcast tech, but VSAT was (is?) used with small terminals for on-scene reporting. If there's a gap between spectrum seizure and 5G rollout. BGAN-style terminals I think use the L-band for their comms, but up/downlinks to earthstations use C-band because that has the capacity to support OB services, along with a lot of maritime L-band traffic.
Which I guess could be fun. Land-based services could potentially switch to 5G, but that's not going to work for maritime. And I think switching to V/W-band just makes rain fade worse.