I know a guy who shot IPSC, IDPA, and the local steel and pin matches with a a pair of Glock 23s. His reasoning was that it's (was) the only caliber that you could get in a high cap gun that could be loaded to either major or minor and he couldn't turn that down with all the shooting he was doing. I mentioned the lower magazine capacity and he told me that the capacity was plenty, but was also an incentive to not miss much. To my knowledge, he's still out there mowing 'em down. He wasn't a one trick pony by any means, the guy is the type who shows up for matches and people say something like "well, the hunt for second place is on".
I was recently gifted with a bunch of .40 brass. A retired cop moved into assisted living and had a sale, but nobody wanted his .40 brass. Since I'm the only one who admits to owning one three 5 gal. buckets of once fired brass mysteriously showed up on my doorstep. I am slowly working my was through the first bucket, sizing, bulge busting, and wet tumbling it. At least most of it has round primer strikes, there's not a lot of Glock striker marks. Duty & practice ammo must have been loaded really hot back then. Especially Winchester. I've tossed a lot of Winchester brass so far because the extractor groove and rims were pretty scarred up. Now I'm looking for more 40 S&W pistols to feed.