My plane is a 172. I wish it was a 182 but well, I can't afford one. Damned nice plane, the 182, especially at my home field altitude (over 6800 feet).

I have two doors plus the baggage door. In a pinch when we were having trouble with the pilot's door lock, I've actually climbed into the plane through the baggage door. It was not fun. If my door malfunctioned while I was in the plane, I'd just climb across and exit the passenger side door.

Having two doors is nice. Imagine if you'd made an emergency landing and wrinkled the fuselage. With only one door, you might have a hard time exiting the plane. That's why some pilots recommend opening the door before an emergency landing. Just be sure to close the latch while the door is still oven to keep it from latching.

Low initial production rates always mean higher prices, so you can be sure 42 (or 24) volt systems will cost more than 12 volt ones. That's just basic economics. Sure, they'll probably implement the technology first on expensive cars and soak the "early adopters", kind of like with VCRs and CD players first hit the market costing around $1000. Me, I'll be happy to wait a while.

Converting expensive cars first is an old automotive industry strategy to help recoup investments. Within a few years, that same technology becomes affordable on more reasonably priced cars. You don't have to look too far in the past to see things like anti-lock brakes, air bags, and traction control were once only found on very expensive cars. These technologies are pretty common now with the exception of traction control. My Honda CRV has all of those things and only cost around $20,000. Hell, even my 1994 POS Saturn had all of that stuff.