Most people buy tires looking at price and how many miles the warranty is good for. I buy tires for traction. Summer performance tires are not designed to last long. They are designed to give you the best traction in warm weather and wet weather. 20-40K is about the range for them.This is a fair point. I was curious why the story focused on Florida EV drivers specifically. Do the same EV car/tire combo last longer in Michigan?? Anyway, cheap tires suck, just ask Nascar from a few years back. But with the range given for EV tires, heck, it could triple and still be lousy.
Your numbers seem incredibly low. Obviously I don't know enough to judge the range outright. I used to own a fleet of trucks, currently own 5 personal autos. I won't even quantify the trailers. I've never encountered 20k mi. wearout on tires. Some of mine have high-end rubber, some have the best balance I thought I could get vis-a-vis cost and rated mileage. Also, I've never swapped wheels between summer/winter, though I think it's a good idea. I just didn't want the cost of extra wheels and storage space.
Most Winter tires don't even have mileage warranties. Again, I buy them for maximum traction in Winter. I like to get going when I need to go, turn when I try to turn, and stop when I want to stop.
Winter tires should be used as long as the temps stay below 40-45. Here that means generally mid to late Nov to Mid to late March.Up north winter tires on a sedan would be super soft and you wouldn’t want to leave them on much past last snow chance. I’ve averaged around 60Kish on Cooper tires on a 4x4 Tundra over the last 24 years. If I only got 20K on a set of tires I’d be looking for somebody’s head. But I could maybe see it on some high performance thing driven spiritedly. I drive like an old man cause, well I’m an old man!