The feedback loop is too long, it's not like a software development harness that can direct the model to write some tests for complex behavior, and iterate until they pass.

There a lots of things that can be subtly wrong, and it gets much worse as your signal frequency increases, or you have to deal with high power/radio/etc. The model (agent) has no way to validate its work.

It is just that the current tools out there seem to work for small or hobbyist boards currently. We couldn't apply them on our complex board designs. But maybe you had a different experience? I am curious on what kind of ways big companies are incorporating AI in their PCB design workflows currently.