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The Weird, Fragmented World of Social Media After Twitter
(www.theatlantic.com)
This is a most excellent place for technology news and articles.
Right. Unless you've started your own instance or joined one that is somehow completely isolated, Local and Federated will let you find plenty of people to follow.
My instance is just a few users, so Local isn't a very happening place, but I love the Federated timeline. It's where I spend the majority of my time.