The extreme backlash against this in the fediverse makes that approach a non-starter; you'll get defederated as soon as anyone realizes what's going on. Having said that, AP/Mastodon not only have poor search and discoverability experiences, but also suffer from serious performance issues relating to federation and fanout that can have outsized and unexpected effects on servers (or, in Mastodon's case, sites hosting URLs linked in posts, since every Mastodon server will repeatedly bash the site to create thumbnails from the URL). Bsky's core approach of making indexing and "algorithms" an explicit and decoupled part of the overall stack is the kind of thing that I think should make it into the fediverse, but I feel like the way the community works in that space means that either it ends up in Mastodon (which de facto sets the standards now) or in a working group that never ends up delivering anything.