However I think the view you expressed there is misguided. If Bluesky locked out third party infra tomorrow presumably the vast majority of people would not move. Thus vendor lockin via network effects remains. (Ie you are always free to leave but you'd be moving from a metropolis to a backwater.)
The only scenario where this isn't true is one where no more than a few percent of the people you interact with reside on any given node. By that metric small AP nodes pass while large ones such as the flagship Mastodon node fail. Similarly Gmail and Outlook fail while any self hosted mail server passes.
It's not an easy problem to solve.
I'd rather be optimistic than nihilistic about it. It's still early and there are a lot of good things happening.
> [..] machine-readable archive of information associated with your account in HTML and JSON files. [..] including your profile information, your posts, your Direct Messages, your Moments, your media ([..]), a list of your followers, a list of accounts that you are following, your address book, Lists that you’ve created, are a member of or follow, [..], and more.
(Note that I actually elided some additional things that are included in the export, for readability's sake.)
https://help.x.com/en/managing-your-account/accessing-your-x...
edit: also, thanks for clarifying!
At the scales these systems run at, you need large indexes. Distributing those indexes across many nodes would require a breakthrough in federated queries, and if you have one of those lying around I’d pay good money for it.