Yep. It was the same before Mastodon, with the predecessor of ActivityPub, et al. People had to "do whatever StatusNet/GNUSocial is doing". Even the code exampl

Yep. It was the same before Mastodon, with the predecessor of ActivityPub, et al. People had to "do whatever StatusNet/GNUSocial is doing". Even the code examples in the specs themselves were unable to interoperate with any instance whatsoever.