The editor of Car and Driver magazine bemoans the disappearance of the manual transmission (i.e. a stick shift with a clutch pedal) and cites this as one of the reasons only 30% of U.S. 16 year-olds bother to get a driver's license. (2008 data)
He suggests that if driving were more fun, more 15 and 16 year-olds would put aside their computer games and sign up for driver training.
Of course there are some other issues, such as environmentalism, insurance cost, parental permission, etc.
In many parts of the country, there really aren't many jobs available for 16 year-olds. Traditional jobs for teenagers such as lawn mowing and burger flipping are generally done by illegal immigrants, and the recession pushed many adults into retail jobs once filled by teenagers.
Aside from all that, can you drive a stick shift? Fortunately it is perfectly flat where I live, so it's easy enough to learn. Unfortunately, in stop and go traffic, the fun wears off pretty quickly.
As far as longevity goes, if you buy a used car with a standard transmission, it's almost a given that it will need a new clutch soon, and probably a throw-out bearing, maybe a clutch cylinder if it's hydraulic, and quite possibly some new synchros or gears in the transmission.
Although hot weather and deep water prematurely kill a lot of automatic transmissions around here, in theory, an automatic transmission should last several hundred thousand miles without problems.