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Oh don't get me wrong, I'm sure there are a ton of people out there who buy it purely for the looks and have never used it regardless of whether or not they know how to.
(Though I still maintain a tachymeter is a lot less useful yet is never questioned why it's on a watch)
Though if you want to go all out on your fancy scales around the circumference, you have to go with a telemeter. To judge the distance of something given the difference in time between seeing it and hearing it:
Considering you still need to know how to use an E6-B to become a certified pilot, I'd like to think they'd know how to use it ;)
Though like I said, the likelihood of a pilot relying on an E6-B these days is pretty minimal, let alone a scaled down version worn on a wrist.
Though in terms of use as a calculator, I'd still say it's more useful than the electronic calculator watches. At least if you don't need ridiculous levels of accuracy.