Understood, but this is not about getting everything in one place or being connected to everything. It’s about the fact that it sounds like you can connect to all (federated) instances and networks (Lemmy, Mastodon, Pixelfed) etc. But in reality it’s still very fragmented, and more people and servers are defederating all the more.

So yes Lemmy’s aggregation makes sense there, Pixelfed’s photos, or Peertube’s videos make sense there. But a lot of sites (eg. Wiki example in original post) and videos watched on the fediverse topic, make it sound like you can create an account in one place and then reply, like, comment etc on the other networks as well.