I suspect that, with a bit of thought, there could be a technological way of largely alleviating that 'problem'.Unlikely. The point is that BT are trying to close ~80% of their exchange locations. An all-fibre access network will mean that they only need 1000 exchanges nationwide. .... Keeping exchanges open to serve a handful of copper users is wasteful.
I'm not sure that I understand the perceived problem. One doesn't need FTTP to facilitate digital communication so, if the proportion of people without it became very small, then any necessary equipment could be installed in the (very small number of) consumer's premises, couldn't it?If you move the equipment that serves dialtone from the exchange to a cabinet in the neighbourhood, it's the same problem at a different scale [tens or hundreds of thousands of cabinets you have to keep having around rather than thousands of exchanges].
I think there is precedent for both large populations subsidising small ones and vice versa!The other reason that internet-only customers aren't subsidising voice-only customers is because of the ratios of the two populations!

