Stan Evil, a little tale to contrast with yours. It's a bit apocryphal bit I first heard it over 40 years ago...
Early days of the Comet 4 and Boeing 707 crossing the puddle.
The Comet 4 with its thick wing was doiing well at M0.78 and cruise climbing. One day the Speedbird was at 43,000 and doing the usual cruise climb at M0.78 or so.
Below, clearly visible, was the B707, trailing at about 37,000 or so and on the same VHF transatlantic frequency (119.7 ??). Whatever...
In a moment of arrogance the Speedbird captain says to his American travelling companion, "Whatcha doin' down there Buddy?"
Back came the answer:"0.83".
Pontius, 14s were pressurised, n'est-ce pas? 11s were open to the atmosphere, however.