Satellite is less outdated than you think. ViaSat has 100 Mbps plans, albeit with a 150 GB soft cap. 50 Mbps is available for a relatively reasonable price, depending on area. Of course, there's still the speed-of-light problem.
With that said, 25/3 with a 160GB cap, particularly if it's a soft cap, for like $60/mo,, would be straightforward to sling via 2.5 GHz 5G, and if advertised at all would give Sprint probablh 80% market share in anywhere that can't get cable or fiber. The number of places that can hit those speeds over DSL that can't get cable or fiber is low enough that you don't really have to worry about those folks (basically only rural telephone companies/co-ops do that).