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I very much doubt it, in the same way that I doubt anyone actually uses calculator watches for mathematical operations; I'd imagine pilots derive a small degree of comfort of knowing they've got a potential backup, even if it they don't actually know how to use it...
Thrustvector-
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.
mmccarthy
This came up as suggested spam on the social media, but still... anyone actually USE these things?
https://journal.hautehorlogerie.org/en/slide-rule-what-is-it-and-how-does-it-work/