From what I've seen, you can search for individual comments/posts related to a topic (advanced search), send private messages, you can see what's trending and there are more options for moderators to manage and create communities.

But Jerboa is already good and I prefer the interface over the web app, especially on mobile. The only issue bothering me is table format is broken.

Almost 30k, lemmy.world is quickly becoming the largest instance, insane.

For me it's lemmy.ml, I can't sign up to this instance.

You're right : https://lemmy.fediverse.observer/list