I learned to drive stick 10+ years ago on a friend's 1999 VW Golf Cabrio. I've never owned a manual and the only other manual I've driven was an E39 M5. I burned the clutch on it, but it was a rental and the clutch was already mostly gone when I picked it up. So, while I'm capable of driving a manual, I prefer to drive an automatic (or semi-auto).
I'd say that most people in my generation (Millennial) do not know how to drive a manual.