You could be entirely right about planes. But... Here is what I know! We're still largely using 1940s tech when it comes to many planes. Aside from spaceships,

You could be entirely right about planes. But... Here is what I know! We're still largely using 1940s tech when it comes to many planes. Aside from spaceships, planes are the most likely to kill you when something goes wrong. So I think that's why they are slow move to new technology. So maybe fuel cells are the way to go. Maybe hydrogen. But, I still kind stick with the idea that if the tech was out and fully worked out today, in 40 years, there will still be planes flying around on piston drive ICE drinking refined kerosene.