I sometimes wonder about the element of time, or how long the engine is running.
Add up all the time waiting at stop lights, intersections, drive thrus, stand still traffick where little if any mileage is racked up. Add up all that time over the course of an engines life. I'd be curious to see how many hours are actually 'driven'. That alone makes me think the oil interval is too long.
What I would really like to see is some sort of telemetry that analyzes the oil and relays to the driver when its begun its decline. But then that might put some folks who rebuild engines out of work!
Seems like it would be good for the oil industry though..