Made the same move when we bought this house, went from a lovely 1GB line to the house down to a 35mb line. Ended up getting a second line installed and we've managed pretty well for the past 2 years, Open Reach are installing FTTP right now so we should have it back by the end of the summer but it's been around 2.5 years of much slower speeds.The house I’m buying only has FTTC, and it looks like the build for FTTP has been pushed back.
It’s gone from building soon to planning to build in the future - not sure if this is just a change in language, but hoping it isn’t too long.
I’ve had a form of FTTP since 2018, so would be weird going back to 50 Mb
You do adapt and get used to it. Two lines helped a lot, not sure we'd have managed that well on just a single line.