On multi-seat vs. single seat flying cars
You need to look around at commuters. Right now we're on the street, and I dare you to find a dozen cars in the next five minutes that have two people in them. And it's a Sunday, so the probability is much higher.
When you're dealing with constants of flight, you include the weight of the pilot, the airframe, and the weight of an engine. And then when you start throwing in variables, like batteries or fuel and then "well, I think I'll have one passenger, maybe two, maybe three … actually six people's really nice. How about 12?" When every person weighs 180 pounds, you push the design into a place it doesn't need to go to allocate space and strength and range for people that are not necessarily in attendance.
You're building machines for people that don't exist, again and again and again, and again, and there's no reason to say it's the right way to get to market, because it has never, ever worked for a hundred years. Nobody has brought one to market, nobody has one, nobody wants one, nobody buys one, nobody uses one because they keep making so many seats that nobody sits in. The constants and the variables don't add up to justify lots of seats for people that don't want them.
When somebody buys a sport bike, what do they want to do? They want to twist the throttle! 160 million registered times! You can't ignore the popularity of one person vehicles and how people will dedicate their time to use them, and derail our chances of flying off the Earth because so many developers insist the market will demand something we have no evidence it will.
That has been done over and over and over and over with every machine that has a tombstone on it. Terrafugia most recently delayed deliveries so it could fight battles for a plastic windscreen and to increase the weight allowance of light sports. Two person, four wheels, overweight. I do not ever expect to see a Transition delivered as they exceeded the light sport weight limits. Now they're circulating videos of the next design, which is a drawing of a machine that does this and does that. And god bless the crew for trying, but if you claim that in six to seven or eight years you might make this thing that supersedes the other thing you didn't deliver, it grows the graveyard.