When I bought a Model 3 last year I knew full well the issues with charging, temperature capacity loss, battery heating, etc. What I was surprised by was loss of regen! If the battery is below 20F or so then the firmware will only give it a trickle of regen braking. After all, it's effectively very fast charging, which a frozen battery can't handle.

I wonder if regen braking going to zero is behind some of the horror stories of sudden unexpected range loss in cold temps.