Use cases please?
I really, really want ultrafast broadband - I'm running an IT business here! But I'm not convinced that vast numbers of the population need 100mbps or even 30mbps. I suspect there are a solid portion of households with one or two people who are happy with a stable 10Mb - or even no internet at all!
Take a household with a couple of teenagers who want to stream video at the same time - three 8Mb streams is still only 24Mb. And spending billions on upgrades so that people can watch Love Island in 8K at sometime in the future is a bit silly.
What most people want I suspect, is consistency and reliability. Even 20-30Mb that is 24/7 and rock solid, is better than a flakey 50Mb that drops to 5Mb during the evening. A reliable FTTC that delivers 50Mb to everyone, with an extra cost option of FTTP for those who need more, should last us for quite a while.
Mobile coverage is a different kettle of worms, if I can mix metaphors.