I'd question your 'vastly' safer comment. Easier to extract a person. Rear end or side impact, could actually cause more problems.
And to fit 5 people in car??
(and yes I used to own an XU1 with exactly that & I can tell you what a pain in the backside it was (looking back).
How do older or invalids get into the car.
You've covered a very small percentage of the potential drivers (yourself).
Cars today are inherently much much safer for the driver & occupants
