Altnets are starting to hit cashflow issues, primarily due to their interest on debts situation. But there also could be other reasons of course.
We even starting to get altnets pulling out of state subsidised rollout contracts now, which shows how bad it is getting.
I said a while ago, with telecoms its nearly always the same story, the first part of rollout is like they have money spilling out of their pockets, its inefficiently done, generously done, then they start to care about costs mid phase and eventually the accountant hammer comes down and it all comes to a halt, usually before the original ambition is achieved.
The only provider who has a chance of meeting their goals is probably Openreach.
If it makes you feel better, you still have FTTP availability, and OR wont be the worst network as it has a mature wholesale infrastructure, giving you a lavish choice of high quality established retail ISP's. I would rather be in that situation than be on a smaller retail lock in altnet who has primitive transit/peering arrangements, CGNAT etc.