When I was younger I was really excited about procedural generation, because it seemed like a way to give games replayability. And it does do that for certain types of strategy and builder games, e.g. MOO2 or Factorio.

But, so far at least, it really doesn't work for first person games. You end up with a universe that's seemingly, but also endlessly boring.

I used to quite enjoy exploring in Minecraft though.