If they use emacs as the web browser, quite likely.
My dad spent a couple years basically using it as his standard OS while consulting. Couldn't guarantee what software a company required, but if everything was done through emacs, he'd have no problem setting it up to his liking.
Emails, builds, etc. I think this was before the web browser was up to snuff though. I never quite got into it at that level, but the power users easily demonstrate the value of knowing a powerful system very well.
Did you mean for this to be as condescending or off-putting as it comes across? I'm really trying to be generous in my interpretation but I'm not sure how else to read it.