Remember the context - this is while solving a whiteboard problem. Its bad in the same way asking candidate what their birthstone is - because any answer offer little or no signal about the odds of a candidates success at the company.
I'm curious to know why you think asking about AI usage is a good interview question.
If you're going to have people use AI regularly, it's worth asking so that you can get a sense of their interest/willingness, experience level, and training needs. That said, more specific questions are typically more revealing. Personally I'm fond of "If you could give Claude only 1 instruction, what would it be?"
I'm curious to know why you think asking about AI usage is a good interview question.