I primarily shoot 3Gun. With the rise of the 3Gun Nation Tour, IMGA rules (and Horner rules) are now King in 3Gun and Multigun. USPSA's MultiGun rules are so far out of the mainstream for most 3Gunners.....it almost doesn't make sense to shoot USPSA Multigun matches. I rarely do because I have to change the way I shoot, my ammo and the rules sub-optimizes my Open Saiga.
Every match on the 3Gun Nation Tour (except USPSA MultiGun) sells out and the 3Gun events are drawing more and more shooters every day. I know IPSC and USPSA got most of us into shooting, but if the 3Gun market is moving away from USPSA rules....wouldn't it make sense for USPSA to follow the market?