I don't see any reason why we wouldn't start seeing more and more of this in the near future as these currently siloed platforms begin to realize there is nothing stopping them from doing this. They have every incentive to just start showing Nostr notes in their own clients. It does nothing to hurt them, and only enriches their existing content. It also helps keep people from leaving their app to go to one specifically built for Nostr.

Oh, Brazil is trying to bully X into censoring posts? Fine. Anyone from Brazil is no longer posting to X, but to a Nostr relay, and X just displays the notes, but doesn't have any control over them. Just like with all the other notes X is displaying from Nostr without hosting them on its own servers.

It's just a matter of that concept clicking in the brains of those at the wheel for those platforms.