Looks like someone really kicked the hornet's nest recently on mastodon by announcing (not even deploying) a Mastodon-BlueSky bridge. Just take a look at the github comments here to get an idea of how this was received. Plenty of people way more experienced than myself have weighted on this issue so I don't feel the [...]
it would be nice to have everything federate everywhere, but small instances just dont have the resources. its untenable for the small scale.
It would make more sense to not just pull everything by default and let instances control how much federated content they want locally and rely on the owner instance to provide the rest on demand.