The change is still not permanent until it reaches stable/permanent, we won’t remove it earlier…beta just enables it by default earlier for self-hosters. As Dave says:
You can still disable it if there are issues in beta.
I’m working on this presently, I had to get internal consensus on what to do with this. So far we haven’t heard any feedback on this except from you, so I don’t think it’s causing a huge amount of problems for site admins being in beta right now.
Trust me, I want to get this fixed as much as you do, it is my change, but I also have competing priorities on my time.