FTTH delivers a fibre connection all the way into the home/premises, unlike FTTC that only delivers it to the cabinet - from where it uses the old copper.
FTTrN takes fibre all the way to the pole, and just the copper from there is used. So similar to FTTC but shortening the copper length greatly.
G.Fast I don't know a lot about but is an advance on the VDSL2 used for FTTC, expected to be useful on copper runs of 500 metres or shorter.
The indispensable man or woman passes from the scene, and what happens next is more or less the same thing as was happening before.
My broadband basic info/help site - www.robertos.me.uk.
Domains, site and mail hosting - Tsohost
Connection - AAISP Home::1 80/20. Sync 59997/15142kbps @ 600m. - BQM