My biggest gripe is that the all feed is not actually the all feed from across the fediverse, but a feed from all instances your instance is federated with. I understand why that is the case, but the fediverse really lacks a way to explore beyond your walled garden and its natural bias. Essentially this acts a mandatory content filter that I have not set up or opted in to, which I personally object to. I have the tools to show and hide what content I want to see, I don’t need it pre selected for me. Or at least give the the additional option to see a feed of all instances and communities across Lemmy / the fediverse I have not personally blocked or filtered out.
I think the 196 community is the originator, though I already didn’t know what they were about when on reddit, I mostly find their posts confusing. From what I understand the (only) rule is that the post title must contain the word rule.