Single pilot, or no pilot drone airlines will NEVER, EVER, NEVER, EVER happen in our lifetime and probably not even your kids lifetime. Way too much liability can happen with those scenarios. I will get into my self-driving car and kick back in my lazyboy chair as it takes me across the country before I get in a drone airliner. If anyone should worry its city bus drivers, taxi drivers, and garbage truck drivers. I can see those going completely automated in our lifetime.