People pay alot of money for screens in thier cars linked to the ecu that show exact goings on, pressure/temp/afr e.t.c, how comes no one has a screen (7' or something similar) linked directly to the ecu? When you plug in the ecu to your laptop you can see everything going on, so how comes you never see anyone with a small screen installed showing everything, and instead spend hundreds on those little digital ones and gauges all over the car?