I don't mean a single point of entry via a bridge. I mean each individual instance will interface with Nostr and any other protocol seamlessly. The (partially intentional) problem with BirdSiteLive was that it was bound by the API limits and read only so Twitter wasn't able to flood the Fediverse. Everyone had to cram onto just a few BSL instances to get news feed accounts or their e-wafiu dripfeed and this caused a lot of problems.