They are pretty useless if they only fire when the car is already turning. The whole point of them is to give a warning prior to turning.
But I like manual transmissions as they force me to pay attention to the act of driving quite frequently. Without that constant reminder, I have a tendency to zone out and go on autopilot myself, which is of course dangerous.
Manual transmissions are my hack to attack this issue - but I’d love to have a self driving car where I was reasonably confident that my zoning out would not be a safety hazard. (As a manual transmission isn’t a great hack, and I live in an urban area, I mainly take the bus, which solves the "zoned out problem" completely.)
You can't have a system that doesn't need a person to do anything 99% of the time but requires that same person to take over control at a moment's notice to deal with some situation that the computer doesn't know how to handle or, indeed, didn't even recognize.
[1] http://en.wikipedia.org/wiki/CAFE#Agreed_standards_by_model_...
[2] I'm not saying the days of the V8 are over (like in Mad Max 2 -- "The last of the V8 Interceptors. A piece of history.") .. but if you want one, you might want to start thinking about buying one to keep.
http://consumerreports.org/cro/2012/01/save-gas-and-money-wi...
If you choose the CVT in the Nissan Versa, you'll get 5mpg better economy over either the manual or the automatic choices.
http://www.edmunds.com/fuel-economy/five-myths-about-stick-s...
That said, trucks and passenger vehicles with rubbery shifter bushings might be a different story. There's a lot of shifter and clutch variation out there.