The fact it runs on pretty much any computer really helped its popularity too
I don't know where you get this from. I have seen many computers where it doesn't run, or it fails to run well. For a game with quite simplistic graphics, it sure does take a powerful machine to run it. Sure it runs on Linux, OSX, and Windows, but it requires quite a lot of resources on any of those machines. I've seen Minecraft clones that run much faster than the official Minecraft, despite the fact that the game creator obviously put very little effort into the game. Which means that it's not as fun to play, but ultimately on some of my computers its the only choice I have, as the official Minecraft is extremely slow and unplayable.