And again, I am very conservative. I never run tires down to the "end of life". I usually replace them when they are down to around 5/32 to 6/32.
The "better dry traction of less tread depth" means little to me on the street. Heavy rain traction is what I am concerned about, and around here where I live, downpouring rain is common. I want good tread depth.
But then I'm also the guy that replaces all hoses and belts under the hood at 75K miles too, etc, so take what I say with huge grain of salt.