5G will have the same problems that 3G and 4G has/had. In cities, where the demand density is high you struggle to build enough masts eg in central London we did some work for O2 and planning permission in the posh parts can take years as all the buildings are listed etc. In rural areas, you have huge distances and not many paying customers, so masts are easier to deploy (outside national parks), but they don’t cover their costs in terms of revenues…
5G doesn’t really change anything, capacities have gone up a bit over 4G, but still no where near enough capacity density to touch cable / fibre.
I’m old enough to remember the disappointment that was WAP 😉 Back in my telecoms days,
I vaguely remember that from early 2000 ish, IIRC 3G made it obsolete.
BT and the like really didn’t seem to see the whole data thing coming
I always though BT didn’t care. They always prioritise quarterly results over long term investment, so made no investments unless Ofcom etc force them to do so. They’d have been quite happy to have the uK still on 56kb/s dial up modems as long as we had to pay 20p/minute dial up costs…