@jwildeboer ideally there should be a reference implementation for each popular language. People would learn from them, reuse them etc.
Listening to what many #fediverse developers say I suspect the reason there aren't any such mature efforts is because of the nature of the #ActivityPub specification.
But even the complaints are kinda all over the place, like the proverbial blind people touching different parts of a weird, never seen before #mastodon