Well now, I own most of all we have discussed except the 10mm.
I can say that from all that post on a number of boards the 10mm is a good defensive round, not easily controlled by many, but good. It was dismissed by many departments because not all could control it.
The 9x23 is, to me, a very controllable caliber. Much easier than .45, 10mm, .357 SIG, .40, .45 gap.
Being a straight wall case it is VERY easy to reload.
The 9x23 deserves, did not say it will get it, a very serious consideration as a personal side arm, whether for a civilian or military.
True enough, never take a pistol to war as a primary weapons system. That said a sidearm for the military is a weapon for backup. the same as police have backup weapons and the reason I have a backup weapon in the truck.
The 9x23 will engage, with effect, at a greater distance than most and that IS a valuable thing.
I do not care what caliber you miss me with and I do not wish to be hit by any. If you shoot at me from 100 yards I am likely not to do anything but retreat [subject to circumstances], and, I think this is a true statement for most should we be engaged in an urban dispute which leads to threat of life.
Blessings