Who said anything about you having to pay more? At least here, in the market that I can choose between FTTH and ADSL1 from the same provider, there's a 990 Mbps difference for the _same price_.

Though - my personal opinion is that old copper that no one really wants to maintain is wasted space for cabling that could support significantly higher bandwidth at lower latency. Telcos are already refusing to replace destroyed landlines and instead substituing LTE service or otherwise instead for a decade now.