They have already had several solar charged electric powered flight demonstrators, if i recall one of them stayed aloft for over 24 hours.
Here is a 2016 flight that went around the world with stops at major airports. https://www.theatlantic.com/photo/2016/07/flying-around-the-world-in-a-solar-powered-plane/493085/
Top speed is 85mph and it can only carry one person and costs 170 million dollars, a little less than halfway to the cost of a 747 which can carry hundreds of people at 500mph. Making it look even dumber, the record flight time for an unpowered glider is 70 hours. Im not sure why anyone even bothered to make a prototype.
I didnt way it was anywhere near ready for any sort of commercial use. I was just pointing out how far the tech was 6 years ago...
Here is one 12 years ago that stayed aloft for 26 hours straight... https://www.nytimes.com/2010/07/09/world/europe/09plane.html
You only see one slim view of the air industry. You cant see why people do shit outside of cost, that is your shortcoming. Not others.
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