I'm not talking about BIKE studded snow tires, but rather MOTOR VEHICLE studded snow tires.
One of the nice things about this time of year, from an Idaho transportation-cyclist standpoint, is that studded snow tires are illegal on Idaho roadways after April 30. Except for fire trucks, oddly. The rules are HERE.
There are some places in Idaho's high country, and in the eastern half of the state, where studs might make sense in April or September... but certainly not in Boise. I question whether they're needed at all in Boise. I've lived here essentially my whole life, and I've bought two studded tires total... back in the 70s. They might help on our 1 or 2 weeks each year when there's actually ice on the roads. But skillful and careful driving is far more significant than studs, in preventing accidents.
What's my objection to studs?
Besides tearing up the roads - which is why the State mandates that they be removed for the fair-weather months - they are noisy!!
Transportation cycling is an inherenty quiet mode of transportation, but transportation cyclists are victimized by NOISE pollution as well as internal combustion pollution and dirt-thrown-up-into-the-air pollution.
Yeah, I know... whine, whine, whine!
(Or maybe it would be better described as a loud clatter. You can hear 'em - those studded tires - from a block away. Of course the drivers don't hear 'em so much - they have their windows rolled up and their climate control and radio blasting.)