Hopefully G.Fast will mean BT will have to replace some aluminium - as I assume the higher frequencies of G.Fast will exasperate aluminium's affect on the signals etc.
That would mean a change in their position to date, which seems to be that your phone line is what it is, and that you can only get the broadband quality that your phone line supports. Unless there are precedents for BT (or BTW or OR) upgrading cabling to allow it to support new broadband standards, does anyone know of any?
Anecdotally it seems to be difficult to get BT to even agree that existing line quality necessarily has to be maintained, let alone improved. I've seen several posts on Plusnet from people who've been told their reduction in speed is because their line has "degraded" and that this isn't a fault that will be addressed.