Lemmy, kbin, Mastodon, Misskey, Pleroma, Friendica… They all use different APIs, and those APIs need to be supported separately by developers if they want their app to be compatible with all of them.

ernest is talking about changing the kbin API to be more in line with lemmy’s, which would allow apps made for lemmy to also work with kbin, but they wouldn’t, for instance, work with (or possibly even know about) kbin’s microblogging feature.