Most cars don't have it, but cars at this price have something similar. It's pretty important w/ BMWs and other high performance cars though. The reason being is that they handle so well, you forget that physics is still in play. I mean, I instinctively backed off to a certain degree in my Civic b/c I knew it's a little front driver and not a sports car. W/ the BMW, I can take turns at FAR greater speeds with MUCH less drama. It's easy to think that the car can handle pretty much everything you throw at it. Within reason, that's true. But, DSC is worth its weight in gold at the times when stuff happens when you DON'T expect it. Say a suddenly decreasing radius turn or someone cutting you off, etc. If you have it off unnecessarily and something like that happens, you're screwed. That's why all of us are basically saying to leave it on unless you want to slide around.