Drivable aircraft would need to be more convenient than cars. Does anyone do a pre-drive walk-around and engine test of their car, or do they just turn it on a

Drivable aircraft would need to be more convenient than cars. Does anyone do a pre-drive walk-around and engine test of their car, or do they just turn it on and go? If you're in a city do you request permission to begin a trip from a DMV controller via local frequencies, or just go wherever? Does every home have a runway or just a driveway? These aren't insurmountable challenges but there are chasms on the way from possible to safe to convenient. (Also to your point 6, I'd add to the Kzinti lesson: any energy storage device is a weapon effective in proportion to its stored power—gas tank, flywheel, Li+ battery, dammed hydro, you name it.)