I think the fact that devs even have to think about using "each others schemas" is a pretty big flaw in the system. It would definitely make ATProto look a lot better if it had a standardized way for all of its app to talk to each other. You don't want devs to have to implement new schemas for each and every new app that pops up on AT just so they can communicate with each other.

Like, it would be pretty dang cool if you could follow a WhiteWind blog from your Bluesky account. Honestly I'm a bit confused as to why this isn't a priority for the Bsky team.