There are a large number of unanswered questions about the Fediverse. I don’t just mean questions that users may have, but questions for which no suitable answer exists yet. Some are extremely abstract and existential like “will the Fediverse survive the next decade?” Other questions are very concrete like, “What is the copyright status of a federated post?” or “What are the moral implications of federating content that may be harmful or recording a crime?”
I wonder, for those of you who stay up nights thinking about the Fediverse, which question is the most important to you?
No it doesn’t? There is only one Lemmy implementation. There are some similar alternatives like PieFed and Mbin but those are separate implementations and are not in any way related to Lemmy, aside from using the same ActivityPub extensions.
There is really no such thing as a “platform type” - it’s all ActvityPub under the hood.
Beehaw is not very happy with the Lemmy project, and was looking for alternative implementations a few months ago. I remember to have read that they have found something written in Java, and maybe another one, that was basically a separate implementation of Lemmy.
Try to view a Peertube stream on Lemmy, then. Or subscribe to a Mastodon user. There are platform types, and there will be at least until the platform has to implement its own way to interpret and render the content of an other platform that hosts content of a different kind. Even when a platform type implements full AP compatibility, there will often be things a specific platform won’t be able to display.