For me it was the default option when I was trying to figure out how to create a login. When I googled “how to sign up for Lemmy” world was the top search result. Before signing up, I had a basic understanding of how this this worked from when I tried out Mastadon. I had read that it mattered way less which instance you chose because most of them spoke to each other unlike Mastadon, which was a big reason Mastadon failed to hold my interest. Since the instance doesn’t really matter, world was simply the easiest choice. I signed up, and downloaded the Connect app since it looks the most like Bacon Reader. So far everything works, makes sense, and I’m really enjoying everything!!