Same thing for me, Minecraft servers were part of my "social media usage" when I was younger. I like how they offered different degrees of interactions. You have basic chat and private messages, but you can also go on Skype/Mumble/etc and talk to people.

These days I kind of have the same thing with a private Discord server (5 people including me) and Twitter. My Twitter account is private, most of my friends (~10 people) are also in private. I can have a window on the "outside world" by following stuff from the outside, but interactions are limited to me and my friends.

We usually set up a new Minecraft server every year and play a lot for a month or two (most of us are still students), and having a 3D world that we can modify at will is always very special. I've thought a lot about what the future could look like for us. I have this idea of a "3D coworking space", though for now frequent Discord calls and Twitter interactions are enough. I do miss the feeling of building something together and living in a (virtual) space together. Just like it's easier to remember things with a mental palace, it's easier to remember the memories we made together while visiting our Minecraft servers.