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> Ground infra can suck. It will probably be stuck at 6Mbps down forever since it is not economical to upgrade it.

Having competition changes the economics, at least somewhat. Look how fast AT&T rolled out fibers to all the cities Google announced they were going to do fiber in. It's still expensive to do new runs everywhere, but it may be worthwhile to keep some business. In some areas, as some customers leave, staying customers may be able to have better access to bonded lines. In other areas, the carrier just needs a kick in the pants to use more flexible/generous profiles to let customers use the speed that's available.