I'm sure this type of tech can be rebooted at any time depending on the need. I think a sustainable commercial model would be difficult with the global slowdown. Many of these moonshots might sadly end earlier than anticipated. I don't think COVID is the end of all momentum in startups but it sure feels like it may take a generation to return.
there is no reason to reduce tariffs in the immediate future and tariffs are typically a long term function for them to work. the true winners of this is embraer, Bombardier, and a few others.
Driving a wedge between us, eu is laser focused by many non eu, us companies due to the amount of possible market share gain. China is coming out with their own air transport company as well as a few other industries.
So really it is US, EU vs the world in some of these interests.