Tire performance degenerates greatly the more they wear out.

*Especially* wet-weather performance. 2/32nds an inch is the legal end of tires but by this point you are taking twice the distance to stop the car.

https://cdn.discounttire.com/sys-master/images/hfb/h15/89828...

The front tires has more weight (especially when braking: the weight shifts forward due to momentum). If you want the front tires to perform better, you need to have longer treads / less-worn-out tires, especially in wet weather.

BMW recommends not rotating tires on performance vehicles, since back and front tires are different anyways. I guess that means we are just going to have less life on our tires, but regenerative braking should help at least.

> regenerative braking

That still puts the same stresses on the tire as regular braking.

I’m guessing it’s because AFAIK most people don’t have a separate set of winter tyres which means you automatically rotate them twice a year.