TDD is fundamentally problematic in every practical implementation I've ever seen. I don't think the same thing, but much faster, is going to help at all. TDD tends to cause adverse, higher order effects.

I am currently observing AI authored tests creating a massive sense of complacency because a human no longer owns responsibility for the test suite. It's too easy to reject ownership by way of the various agent prompting schemes. I find myself enjoying the idea of it too, primarily because adding tests to even the most trivial functionality is mandatory due to the TDD policy.

Developing good tests is like an artform. Total coverage is a terrible objective. Correctness does not compose upward. It's a game of chasing ghosts if you think you can build a perfectly clean system bottom up and then magically meet the customer at the top. They're gonna kick your jenga tower over on day one.