Big 10mm fan here and I own a 1066. The 10mm is in ballistics inferior to a .357 Sig what the heck are you smoking???
The 10mm has a less sharp recoil and hits MUCH harder than a .357 Sig does and it's not even close in muzzle energy. There is not a single ballistic category that a 10mm will not outperform the .357 Sig badly in and ammo for the 10mm in my area is about as plentiful and priced about the same as .357 sig.
The best 10mm ever produced was the 3rd gen S&W 10 series and they need to reintroduce them as a TSW line in the 3.5, 4 and 5 inch barrels!! We need to see a S&W TSW 1013,1066 and 1006.
The Glocks are mere toys in comparison and the Colt Delta is vastly inferior in case support and strength to the old Smiths. My first 10mm was a Glock 29 which I sold soon after I picked up my 1066 because the Smith out shot it so badly I never wanted to shoot the Glock again.
10mm is making a major come back and several major ammo companies have recently released brand new full power 10mm ammo including Federal. 10mm is not going anywhere as it has has a very loyal following. Smith is making a serious marketing error in not reentering the 10mm market with a updated all steel 10 series.