The Rolex tool watches originate from a time when precise time keeping under extreme conditions became necessary and was not universally available.
Up until the 80ies you could really argue that you bought a tool and this was reflected in the design: matte surfaces, external parts that are easily replaceable - and at low cost.
Today, divers use computers, the militaries use Casio - no need for a Rolex tool watch. But the desire for adventure lives on in the rich and beautiful of the world, and all luxury brands cater to that desire: from the Porsche Cayenne, the downtown offroader, to the Rolex Deepsea, the caricature of a diving watch. No longer designed for professionals but for luxurious reminescence of adventure.
One thing about the bracelets: my favorite Oyster bracelet is the folded Oyster of the late 60ies/early 70ies. It is strong enough, very light and adapts beautifully to the wrist. On my older Subs I like the charm of the fragile rivetted Oysters and would never even think of putting a later heavy Oyster on them.
Even on my Daytona 116520 I swapped the bracelet for the older version from the 16520: lighter, less chunky clasp - oh, and it was scratched already so I could keep the newer bracelet in the safe!
And yes, I absolutely love the SD: