Threads was initially conceived as a social network that supports ActivityPub, a protocol used by Mastodon, Lemmy (a Reddit-style aggregator), and WordPress. ActivityPub promises portability between applications — allowing users to interact or follow Threads users from other applications.
As a marketer I think it could be great to make sense of content integrations on other apps. But not highly effective.
Yeah, this is correct. Almost literally nobody cares about decentralization, in spite of it probably being super important (big picture wise).