Totally depends on model and configuration. For my P85+ with 21's...not a hell of a lot. Getting new tires tomorrow, as a matter of fact. I got 9K out of the rears, which is actually pretty good. I have heard many who have only gotten 5K. The fronts are fine. But I am moving from Michelins to Hankooks in the hopes of doing better and doing all corners at once. I am also very carefully aligning the wheels based on what I have learned here at TMC. It's a totally different story with 19's. You can get 20K plus easily. Check the threads. There is a lot of info on this topic.
Totally good choice on car options in your sig line.
But "Totally depends on..."?? Reading this thread, I see NO discussion of road types, very little on driving types.
I live at 1500' above Napa Valley. Everywhere I go is up or down hill, around 15 mph curves, usually with a vehicle behind. I LOVE having a pickup pushing me down the hill (at 5 - 10 mph over speed limit) and then I keep it at speed around the "hairpin". He gone!
And, yes, they speed going up hill, too, there being a college up top, and a lot of young drivers trying to get to class. Or somewhere. You aren't popular on a single lane road seven miles long if you creep at ten under the limit.
My tires last about 20K. I buy from Tire Rack, my local tire dealer puts them on. But I would definitely imagine that ANY brand, type, model or configuration is going to wear poorly up here. but it's "totally" worth it.
When I drove a RAV4EV (VERY carefully) I would get about 20K on my tires, and my friend who lives in the 25mph suburbs and then would drive down the freeway at less than 55, always got nearer to 60K miles. Some difference!! Exactly same tires.