[xte]

IMVHO anyone must know the tools of their trade (I do not know if this make sense in English, hope so, maybe also expressed as "the tools used for doing their job"). If today statistic is done with computers good computers tools must be known. Newcomers of course can't know by genetic, they have to learn and universities must teach them so...

Consider that org-mode itself was designed, written and still maintained by an astronomer, one of the most ancient and widespread completion framework for Emacs (Helm) was written and still maintained by a mounting guide that still be a mounting/climbing guide. Of course they are "exception" but they are simply people who encounter "the right tool" at a certain point in time and start to learn it.

On GitHub, for me as any proprietary platform should be ignored, at maximum used to share git repos, certainly not for PR&c that are proprietary unportable stuff. And that's another thing anyone that use a computer for more than play a game MUST know, from office guys with their email only on webmail and smartphones user with their "valuable" personal data (photos, video etc) to IT pro.