Why do you say that? Bluesky is a protocol-first non profit. To my knowledge no company set up that way has achieved this level of success before. They don’t have the same motivations to enshittify that other networks do.
I think it's plausible AT protocol allows a new level of interop/portability between services. It's also possible Bluesky burns through Blockchain Capital's money and starts doing crypto air drops like Keybase.
It doesn’t mean that has to be the primary objective, just that at some point it should happen.
Even though I don't like the term "enshittification", I do think that it is inevitable that BlueSky would need to make some unpopular changes in the future to become financially sustainable.
But is this such a bad thing? I used the Fediverse before, which is the "permanent place" that many people claim. But it had many disadvantages, from my point of view. No algorithms, no search, and I didn't like how defederation made it hard to follow anyone I liked.
I hosted a server myself, but it cost money. BlueSky doesn't, until it does. But maybe it is better to basically "exploit" BlueSky's free offers, before it changes?
TLDR: Is it better to jump from free service to free service (e.g. YouTube, Twitter, Reddit), or is it better to permanently stay on a paid or lower-resourced service (e.g. IRC, forums)? I think many people seem to prefer the free version, and jump off when it starts "sinking" (trying to become financially sustainable).