[dangus]

I would change this up: does the industry you work in really require this level of detail? Is this an expectation you’ve set for yourself?

Maybe it does and if so I don't want to discount that, but a lot of me doubts it. I think you want to have an answer to these questions instantly available, but have you stopped to consider whether the people asking the questions expect that? And, if they do expect that, are they being reasonable?

A well-presented "I'll look this up and get back to you" type of answer is often acceptable. To me, the idea of this level of intensity is unsustainable.

I'm going to take a wild guess and assume you're in engineering. If so, I recommend you find some reading on what Sales Engineers do in situations where they're asked curveball questions.

My default thought is that anyone expecting you to know everything instantly is probably being unreasonable.