I agree. Its one of those things you may only need once but thats when its worth it.
Not to mention turning it off is easy when your switching to dirt.
I will have a hard time buying another bike without it.
Im not worried about it being "one more thing to break," cars have had it for years. The technology is proven.
Not to mention that thats what the purist say about every kind of technological advancement. It gets old guys.