I feel the same as you to be honest, if FTTP ever came here, would I need it? I certainly don't require the speed, reliability yes, that is ok, saying that It is fine here now.
Price is the problem, i would not pay £50 a month for something I do not need and to be honest I really would not want to go with BT.
I can understand why you had second thoughts. But since you have gone with it, I hope it all goes well for you.
Adrian
Desktop machine Ryzen powered with windows 10 , reluctantly.
Plusnet FTTC