Not entirely true! As you can see in the picture below, I have a wideband in my car.

BTW, no I didn't develop, nor do I sell this product. I'm just someone who decided to try it over a year ago, and I love it. I was the guinea pig for this product on the
http://www.mazdamp3.com forums. It's like having a ****load of gauges in one. You can display up to 5 sensors at a time, reset CEL's (Check Engine Lights), and monitor sensors that most cars don't have displayed. You can see how advanced your timing is...how accurate is your speedo? My *** has been saved by this thing one day when I didn't follow proper procedure to refill my radiator after a flush, and my stock idiot gauge was asleep at the wheel. Anyways, here are a couple of links to the experiences myself and some others have had with it:
My experience:
http://www.msprotege.com/forum/showt...ghlight=nology
Another Mod's experience with Auterra:
http://www.msprotege.com/forum/showt...ghlight=nology
These are both PDA-based solutions.