There's a gulf of difference between domains where self-play means we have unlimited training data for free (e.g. Chess) versus domains where there's no known w

There's a gulf of difference between domains where self-play means we have unlimited training data for free (e.g. Chess) versus domains where there's no known way to generate more training data (e.g. Fine art). It's possible that the latter domains will see unpredictable innovations that allow it to generate more training data beyond what humans have produced, but that's an open question.