The thing my kids most consistently spend their allowance on is hypixel (a minecraft curated multiplayer server with some scenario-based games is the best way I can describe it).
It seems that he taught himself to find the web browser, then find google, then search for Minecraft resources, then enter urls for Hypixel and Mineplex into Minecraft.
I was torn between pride and trepidation of what's to come.
Hypixel is pretty great (I actually still play sometimes!), and they have a good curse filter and it’s definitely family friendly.
To be honest, I spent a ridiculous amount of time on MineCraft over the past 10 years (definitely over 5k+ hours), and it’s taught me an incredible amount. It’s where I picked up my first O Reilly book, on Minecraft mods, where I learned for the first time how to self host a server, and also where I made some really great friends.
I’d be more worried about your kid finding something like social media FROM Minecraft - for example, I spent a ridiculous amount of time on Reddit, which I found through MC. As a kid whose parents don’t really care about what I do on the internet, unlimited access to viewing whatever I wanted wasn’t necessarily a good thing.
Joining IRC a modding channel and talking to Mojang devs every now and then was a pretty interesting experience.
I doubt that this is possible nowadays, especially after Microsoft's acquisition of Mojang.
My memory is failing me but I also saw Drew DeVault on IRC using his former online nick and since I pretty much used IRC exclusively for minecraft related things he must have done something related to minecraft back then as well.
The appeal is that it is some sort of a Second Life or Metaverse for these streamer personalities who otherwise have no "physical" opportunities to interact outside of voice chat. In these worlds, they have towns, homes, pranks, disputes, wars, and lots of opportunities for highly entertaining roleplaying in general.
I mostly watch virtual youtubers (pekora from hololive in particular) but if you're not into virtual youtubers, the mod'd OfflineTV server is also great. Michael Reeves will probably appeal to the people on HN. Right now there's a nuclear war going on and Reeves thinks he can win by programming an army of self-replicating turtles using Lua: https://www.twitch.tv/videos/805937812 The guy with nukes is the dictator of the server: https://www.youtube.com/watch?v=HrtKTFZvK5Y