Tell me fuel burn per seat mile and we might consider this. The weight penalty for an aircraft capable of near vertical takeoff and landing would be a no go. It is all about seat burn per mile. We do have aircraft that can do this for the military. Their fuel burn is of no importance as the mission is of most importance and the tax payer buys the fuel. None of these aircraft have long ranges. They have specific short range missions. You will not have aircraft that can do a Los Angeles flight to Heath row London that can do this.
Thanks for the dose of reality on fuel.