What say we cut the personal attacks and talk about what really matters.
I stand by my numbers. Remember, they're my numbers, I buy the components and shoot them myself. You may do the math differently, but I'm definitely not buying brass and shooting it only once, either 38 or 9.
4000 38sc cases, fired 6 times each (including the match where we didn't retrieve them) is 24,000 shots fired with those cases. That's pretty good use for the money (the $600 turns into $25 per thousand shots). I really don't think many folks buy new brass and shoot them only once and leave them on the ground, but if they do it's their choice.
If you're going to have a $4000 gun and thousands more in mags, belt and other equipment, spare parts (even spare gun), and pay match fees, travel costs, and the cost of loading many thousands of rounds for practice and matches, why would you be all worried about $600 a year for brass that you can fire 24k times (more, actually)? This is Open, the land of hot equipment and a devil-may-care attitude. If the brass bothers you, by all means shoot 9 major and still put out all the other costs.
Again, 38 seems to work for 54% of the Open folks at Nats this year, and 9 major works for 46%. Nobody's "wrong", everyone seems to be having fun. Shoot what you want, what feels best for you, and understand that Open costs but the benefits are tons of fun, either way you go.