Never shot one. I want one for the novelty and bc I want another caliber.
I have .44 mag & .45LC. Those are my largest handgun calibers. I think I'd like a 460 & 454 one day. Not so sure about 500S&W.
I don't want the 10mm to be a boomer.
The G40 caught my eye because of the MOS feature, capacity, & the longer barrell. I didn't really thing about increased muzzle flip. I'll have to think about that some more. Capacity and weight were the reasons I like the STI.
Those are great reasons to want a 10mm. Options and versatility are nice to have.
The MOS is a great feature if you want optics.
The extra muzzle flip isn't a huge difference or a deal breaker in most situations.