Regardless of practicality it sounds like a super-cool trip... or at least it did until I thought about the 32 hour (including layovers) in cattle class going Wellington to Munich I did earlier this year. It was brutal. I even did the round trip inside a week back in 2015. Two 30+ hour trips virtually back-to-back was hell. 5 of them would be even worse, regardless of what class you're flying. I think in 1926 most people who can afford it are gonna stick with the boat.