Some cars are using this function quite good (Changing behavior of gear changes and injection to the engine, as have been mentioned by many others).
But this has also been a hype in the media and in reviews of cars. Many car models now have this only so they don’t get a bad review (I’m not referring to high end “racing” cars here. But normal road cars).
An example is the difference in suspension. A lot of research is being done to find the best setup for traction for each car model. Is not like they find the optimal stiffness for best traction on a car, and reduce it by 20% (And then add a button in the car to increase it again).
Changes in suspension is so small that you don’t feel the difference.
For these cars, when activating the sport mode, the suspension will first change to become very stiff. Then over some time (a couple of minutes), it will slowly change back to almost the same setting.
And it’s of course opposite when going back out of sport mode.
It’s a little like the humans ability to smell. We are good at noticing changes. But over time we get used to it, and don’t notice it anymore.
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