Why are they not showing quarries and coldwater diving that really supports the very people they "claim" to represent- the equipment manufacturers? Why are no DEM shows held in the NE or NW? Vegas for chrissakes? There is some great diving off NY/NJ. NC/SC. Seattle. Even LA. I'm sure they could find a place where the unions would not screw the exhibitors for an outlet or a table but they won't. DEMA needs to change it's name to DTA- Dive Travel Association. That is who they are really supporting now.
Let's face it, DEMA's doing the expedient thing and trying to get the most bang for the buck. Showing a bunch of divers going into a quarry is not "sexy", showing a bunch of divers on a colorful reef is. Which scene is likely to pique more interest in the non-diving public and get some new divers into the hobby?
Same thing with the shows, they did the revolving city approach for a number of years, and essentially the first Houston show (the second was cancelled) killed that... they went from 11-14K attendance to what, 8K or so. We dive industry people are just as demanding as the general public, "sexy" sells, that's why the show's in Vegas or Orlando pretty much permanently these days it appears. I'd love to see a show in Chicago, Seattle, Boston, etc. (didn't they already do Los Angeles? before my time, but I think I remember talk of it), I enjoyed the shows in New Orleans and Houston, but it ain't gonna happen most likely, not because it's not a good idea to spread the show around, but because attendance would likely suffer.
At some point, if your resources do have limits, one needs to put the money where it'll get the biggest return. Vegas and Orlando are expensive spots to put on a show, as far as the convention facility goes, but they're not expensive to get to, and staying there is a bargain compared to many other cities. If you're trying to draw a crowd to a show, there's a reason they are two of the top convention cities in the world.