Re: WHY WHY WHY WHY !!!!!!
Future proofing should't have to lock into one service provider. Each property built today should be provided with 2 or 3 15mm flexi pipes to a location in the property (beside fuse box say) that leads back to the local "telecoms cabinet" which allows the fibre to be patched into whichever providers want to connect to the box. With 15mm tube, one could even be pre-installed with cat6 type cabling ready to use for a phone/other copper based service if required.
Here in Stavanger (Norway) they are gradually going round town replacing a lot of underground cables and pipes, as they do so, they are laying LOTS of thin orange pipes feeding from comms boxes to homes (the property boundary anyway) then if/when the occupants want fibre, they just need to traverse their own property and through the (usually timber) house wall