I would really like to see AP get some more implementations. Mastodon dominates most of the AP usage on the web as far as I know, so the specific Mastodon quirks on top of the AP spec are sort of de facto standard now. It's not quite like a private company, but it does shoehorn AP into being just what Mastodon does, rather than a more generic publishing protocol.

or maybe we need more generic clients. Something that can consume mastodon et. al. posts! Would be neat to have Lemmy + Mastodon + personal blog posts etc mixing together into a single feed, RSS style.