Earlier quoted context omitted.
>A car's lifespan is mostly determined by mileage. This is far less true in regions with snow. Assuming you drive the vehicle in the winter, a non-trivial contribution to "wear and tear" on the car is rust which occurs even if the car isn't driven a lot. (Cars are far better in this respect than they used to be but rotted out fluid lines etc. is still very much a thing.)
I'm in the snowbelt and well aware of this. Mileage (at a given city/highway mix) is still the biggest factor presuming the car is getting some minimum duty cycle. I said "mostly," not that the number of winters is nontrivial. If you only drive 5,000 miles a year, sure, but that's not typical.
Newish used cars with ~200k on them are usually good buys because often times it's someone who used it for work (salesperson, etc.) and just ground out the highway miles (which are nearly free from a wear and tear perspective)