Since I am not a diver another good question is why move the date down to the 4 o'clock position? I have to wonder was it to make it easier to include the locking crowns and springs to make more room for them in the case? I always love knowing fact like these that are not really necessary but make for good trivia.To my knowledge, they started in ~1968 with the super compressor cases (from the Swiss side) and the 6159 from Japan.
I can see moving the crown down lower gives you better access to the crown while the watch is still on your wrist but why have so many also moved the date display to the 4 position also?Omega made the first water resistant watch, Rolex made the first diver that could go to 100m, Breitlimg beat them to 200m but Rolex perfected the automatic winding mechanism and also made deep dive watches later on. Rolex wasn't even considered luxury until James Bond made it popular. It was like Cabot watch company is today, but they made their own movements.
Omega used tone the top luxury brand at one time, they're trying to regain that crown by making innovations to their automatic movements.
Honestly the 4 o'clock crown makes adjusting the time a lot faster and easier.