Inertia. I went from a 30 lb steel wheel to an 15 lb aluminum and picked up roughly .15 or so. I'm sure there are application exceptions.....but generally everyone benefits from the lighter parts now a days. Faster recovery at the gear changes , clutchless transmissions , adjustable light weight clutches , data loggers .....all expensive stuff............but always the std. of fast "manual" or as I like to refer "semi manual" stick cars. The difference being , clutch assisted or clutchless.
I don't consider "clutchless" as a true "manual".
