It’s harder to see on a large Lemmy instance like LW, but most of the fediverse is very patchwork. The network of Lemmy sites is itself very patchwork, with the MLs, Hexbear, Beehaw, NSFW, etc. all having different defederation profiles, but the whole space is an incomplete mesh. Mastodon has more themed instances than Lemmy, more very small instances than Lemmy, and a much bigger anti-capital, anti-commerce bent than Lemmy, with many more people complaining on main about other instances rules and federation policies, so if you look, you can really see it.

But the whole fedi project is patchwork by nature.