I wonder: what if all the major third-party apps come together to form a reddit competitor? It doesn't have to be any kind of fancy decentralized mastodon type

I wonder: what if all the major third-party apps come together to form a reddit competitor? It doesn't have to be any kind of fancy decentralized mastodon type thing, just a straight up clone of reddit that users of existing reddit apps can seamlessly begin using, maybe even with a way to transfer your account name/posts/friends/subs/etc. It seems to me like this would be the only way for these apps to survive long term, because even if reddit backpedals a bit on this fumbled policy change, it's clear that third party apps are doomed. New attempts to kill them will be more subtle.