After giving it some thought, I'm not sure if .357Sig and .40S&W are really in decline, or if the rise in popularity of 9mm is just overshadowing them. Either way, I don't think they're obsolete. They're still good cartridges and worth consideration. 9mm meets my needs/wants, but I think it'd be nice to have a .357Sig/.40S&W Sig P229. Now that I think about it (...dangerous, I know...), I wonder if there's a .357Sig conversion barrel for the Beretta 96.

I don't see either caliber going the way of .45GAP anytime soon.

Just my opinion.