I learned to drive stick at 34 just for fun. Now own a Mazda 3 and MX-5. Worth it. It's not about out performing an automatic transmission it's about engagement. For some people that's not going to have any value. For others there is no going back to numb econoboxes with automatic transmissions. It's a shame more people don't get over the hump and get to see what driving can be vs. what it is for most.
I have completely the opposite view. To me, all the "engagement" type arguments just feel like someone telling me that they still insist on using only rotary telephones, because it makes them feel more "engaged" with the telephone, "closer to the machine", etc. So I don't find anything magical or special about having to manually manage the gears when a computer could do it more efficiently and relieve me of the need…
Computers have gotten better at managing the coupling sensibly, but they still are not perfect at predicting drivers' future intentions.