The real advantage of a 9mm wheelgun has never been offered, that is the revolver could have a really short cylinder. I have a couple of the Rugers and the Smiths, and I like them. I use it as a BUG for my service 9mm, the 940 carries nicely in a BDU or vest pocket or holster. Gives a really fast 5 shots(I know, a Glock will also), and with moon clips(which I find work fine, I use them in all my revolvers) reloads are really quick. Also gives traditional revolver reliability, and second strike ability on a bad primer(not with Glock or most semis). Hot 9mms are every bit the equal of a .357 in the short barrels, and are much shorter.
It is true that we went to the 9 as a political decision, but it does have its advantages. No doubt the 45 is a better stopper, but with the 9 we have more chances at a hit, and most of our soliders are NOT well trained on a handgun. Most of our NATO allies(?) use the military handgun primarily as a badge of office for officers and some NCOs, and do not consider the handgun as serious fighting tool as we do, or kind of do.
If the revolver 9 had caught on, then Federal would have kept making the rimmed 9 round, and it probably have been picked up by other ammo makers, giving us the really short effective wheelgun round mentioned above.
I stocked up on the Federals, and probably have a lifetime supply, but I use the moon clips, and am happy with them.
Alas, another good idea gone, and probably gone forever given the costs of new handgun production.