You have to define "better" better. Usually it's a measure of the productivity of human programmers using it. So languages that match human thought patterns are

You have to define "better" better. Usually it's a measure of the productivity of human programmers using it. So languages that match human thought patterns are better. It's not clear that AIs would be good at optimizing for human comprehension. If AIs are writing code directly, they might work faster with a very different-looking language that would be hard for people to design. So they might evolve something for their own use.