[rsync]

"Turbos are a good example. Before, they were very expensive to add to a car, and altered the driving experience such that they weren't very practical for the average driver. Now, essentially every new combustion engine has them because you can lower displacement and actively manage power output to a greater degree, pushing up efficiency."

This is true. In fact, some manufacturers (Volvo ?) have new models that are both super and turbo charged.

But this isn't cost-free - these are tremendously complicated engines running at very close tolerances. These will have higher failure rates and will be more expensive to maintain and fix.

Remember, kids: There's no replacement for displacement.