It is on the rise and I'm glad. It's a great caliber. The LSG's around here can't keep any currently or pass production 10mm weapon in stock. Everything on there standard stock orders are sold and used weapons never last more than a day or so under glass.
There are more custom ammo manufactures coming online supplying great full power well made, safe 10mm ammo. Priced well might I add. I even see 10mm whimpy ass .40 S&W class junk in Wal-Mart every once in awhile. And at a couple of local farm and ranch store's. And as always match grade full power and above 10mm ammo is only a reloading bench away.
If you want a mag. class auto pistol load? 10mm is the way to go! And more shooters are finding that out and embracing it.