I beg to differ. 9mm outnumbered the .38 SC/LC almost 2-1 at the 2017 Nationals.
https://uspsa.org/magazine/view//2018-00#page=40
I regard IDPA rules as idiotic because they further handicap revolvers vs autos, when the revolver division is tiny. You’ve got to be die-hard revolver to shoot the division. If it could be more competitive, more people would shoot it. Plus I’d invest in an 8-shot revolver if I could run it in USPSA and IDPA. I’m not going to buy a 627 to shoot USPSA once a month.
IDPA already bears little semblance to real world. Not 10% of shooters run what they carry, or how they carry.
Who EDCs a Glock 34 under a shoot-me-first vest?