Airplanes and their associated support cost a LOT of money, but they have a relatively long useful lifespan to amortize acquisition costs.

In just the last few weeks we've seen FDX and especially UPS stock take a beating when CEOs say they are going to take income and tax reform savings and invest it in CapEx to grow the business instead of returning it to shareholders via dividends or stock buybacks.

There are no single/remote piloted narrowbody civil cargo aircraft on a 10 year horizon that could carry even the 3T payload of the recently announced Cessna 408 SkyCourier...let alone 20T+ like a narrowbody 738, 320/321, or 757 to say nothing of widebodies. As cargo fleets continue to age, they will be recapitalized with current generation aircraft that have 30+ year lifespans. It is that next generation of aircraft, maybe, possibly, that will have single/remote pilot capabilities...

Capital costs are but one reason "fear" of this is greatly overblown in any of our lifetimes.