I know several people <30 who cannot. It's not so much lack of desire to learn, as it is lack of cars available to practice with.
I don't miss driving manuals... well, maybe a few times a month, but it's unfortunate that you can't drive a manual when it's "fun" (spirited driving) and not have it go into a pure auto when it's a pain (stop and go traffic).
2016 M3 - current
2013 ActiveHybrid 3 - sold
2012 M3 coupe - sold