Comment by david_rugaex

I'm in the same boat! It's a reasonable stance but the specific examples aren't air tight. I'm a Mathematician and I can't do long division, I could probably work it out? Like you say, long division was part of a journey that made me very mathematically capable, even if it's no longer an active contributor. My capacity for pencil and paper calculus is undoubtably many many fold worse than my peak around undergraduate studies!