Flexibility is good. Better yet would be for the government to remove itself entirely and free markets will work this out. What company would make a product designed to harm its users? Doing nothing is never considered when the government feels the urge to intervene. On this issue it’s irrelevant since there is no real demand for these coal-powered flivvers. In five years they will have been forgotten, just like the Terrafugias and other flying car belly flops. Pity is all the tax dollars wasted on this stuff. Anyone heard of “lost opportunity costs”?