You can also deploy 5G in the low frequency bands. Nobody talks about that though, as speed is only slightly faster than LTE.
The point is that as more services migrate to higher bands or more spectrum is made available (TV spectrum partially reallocated, 3G is sunset), there is more capacity available for rural locations that need that lower band.
Lots of work on alternatives to fibre for those last few miles e.g. dedicated wireless links to local distribution nodes in villages.