Originally this was a reply to this article about a Windows feature called Recall, but there's a good argument the author's concerns resonate far beyond Windows and Meta to proprietary generally.
They literally work for the Fediverse branch of meta, sure its an evil corp and zucks intentions aren't exactly pure (more than likely an effort to lower server costs) but it is something likely to put more eyes onto the fediverse which I definitely think will benefit the fediverse in the long run.