Beware, though, that not all of them are really connected. For instance, beehaw recently defederated from lemmy.world and shitjustworks.
I would also add that yes, in general one shouldn’t overthink which instance to sign up on, because you can still mostly view content from all other instances. However, you might take a few mins just to check the rules and philosophy of the instances. It’s basically like assigning yourself to a Harry Potter house. In the end you’ll all end up interacting in hogwarts, but being a slytherin can mean something different than being a griffindor
I’ve been seeing a lot of posts about Threads privacy policy lately, where people seem genuinely shocked about it. I think it’s good to raise awareness about how much data you’re selling to Facebook company if you choose to use Threads, but I think it’s also good to remind people (as the article does) that this happens also when you use Instagram or Facebook itself. Ditch Meta