Class 4 cellular automata can actually make surprisingly good music! It takes doing a lot of actual experiments to get a good intuition for systems like cellular automata. One of the things I’ve always found is that whenever I think “they can’t do X”, I’m always wrong. It’s just that I can’t imagine how they do “X”. I think that over the next few decades, we’ll see some technological systems with remarkably simple underlying rules do remarkably sophisticated things. And one result of that is that typical people’s intuition will change—and in the end the Principle of Computational Equivalence will seem almost obvious.