Maybe you're reading way too much into their comment, and unfairly jumping into a judgement? I didn't sense the same feeling of ridicule. If the founders are on here, how did you take it?

I interpreted it his question as genuinely wondering if "the ability to calculate formulas is a defining characteristic of a spreadsheet." Perhaps it's not, but it's not something to bite his head off for!

Jumping to conclusions and failing to give the benefit of the doubt is another drag on intelligent discourse and innovation!