I live 3 miles from a salt mine I've had many vehicles, both auto and manual and noticed no difference in brake life. With all the hills around here even with regen you use your brakes a lot. I also refuse to drive my EV when there is salt on the road, I put too much time into it to watch it dissolve I've almost always owned a sacrificial ICE for the winter anyway.Which in Sweden translates to having regular brake problems due to oxide, thanks to that they salt the roads winter time. Cars with automatic gear boxes tend to have less problems since you use the brakes more than if you drive a stick...
Sooooo, regen might have more consequences than you first think depending on where you live.