This is a multifaceted issue, involving the duopoly of commercial airline manufacturers, strict regulation, and massive subsidies. It costs Boeing 10s of billi

This is a multifaceted issue, involving the duopoly of commercial airline manufacturers, strict regulation, and massive subsidies. It costs Boeing 10s of billions of dollars and usually around a decade to design an aircraft from a clean sheet, with very little incentive for truly disruptive innovation. Developing and testing a wholly new design like this would probably take double the time and more than double the cost. When your assembly, all testing, designs, control systems, and pilots have been optimized "wings on a tube" shape for 70+ years, I'd imagine it's difficult to pivot the core design that drastically. I'm hoping to see some of the government subsidies shifted towards more competition with Boeing's recent failures, but lobbying is powerful, so we'll see.