Yes, but Guppies are vastly more modern than they were in 1967. We now have automatic pressurization, and a real autopilot. And it only took 50 years to get here.

Boeing is still trying to figure out how to make 767 tankers, after they sold 767 tankers to Japan 20 years ago.

Write your congressman(person) now and recommend Boeing get the development contract for the first unpiloted commercial aircraft. It will be airline pilot job security for the next 3 generations of pilots.