100%. Unit conversion is a solved problem, and it is impossible for an AI to be faster or more accurate than any of the existing converters.

I do not need an AI calculator, because I have no desire to need to double check my calculator.

Pretty sure they’re using “design” to mean “aesthetics” in that sentence. I do think we need to less often use “design” to refer specifically to aesthetics or graphic design; every object and system that humans have made are designed.