I agree. Plus there are countless examples of parks close to each other adding the same ride type, from Inverted to Floorless. Love them or hate them, B&M dive coasters are MAJOR crowd pleasers with great capacity and reliability. It's also the cheapest B&M offering (along with the Wing coaster) due to their fairly unified layouts
I suspect every major US park will eventually have one, just like the B&M inverted of yesteryear. I wouldn't count SFMM out of the Dive sweepstakes just yet. The problem with SFMM, is their's would have to break some sort of world record (like Tatsu and Riddler's), so they have to play the waiting game to see how tall everyone else goes.