I've argued this before in a few forums, but I firmly believe that traffic awareness/collision avoidance devices are very useful. The opposing argument is often "keep your head outside the cockpit," but the two are not mutually exclusive. To argue against any additional help in spotting traffic, which can be very tough in certain situations, is merely proof of wanting to argue for the sake of "who's more grizzled?" (great SNL sketch...)
Was coming home from JC and got T-boned by a Cherokee, 500 ft under. Thankfully Cascade Approach had us well before, and it was nice to know, as I never had him until he was about 1/4 mile off my 2:30, despite repeated scan intervals at 10 deg, pause, next 10 deg. A simple proximity and bearing alert, when visual conditions just can't give you enough time, sure is a nice thing. If it shows up on the 496 or 696, even better!
There is no downside to combining good old visual scanning with technological aids. I realize this is an argument for an argument that doesn't yet exist, but I'm counting on something from one of you grumps.
