I've been scuba diving / freediving for more than a decade and very, very few divers ever go below 40m. The amount of training, equipment, risk, annoyance, time, ..., associated with 40m+ scuba diving just isn't worth it. Similarly, not a lot of people are capable of freediving to 40m+, and just a handful of people can freedive anywhere near 100m (without mechanical assistance). It would be very disappointing if a watch rated to 100m couldn't accommodate recreational scuba/freediving to 40m.