Using regenerative braking rather than actual breaking in snow or ice is a sensible approach, as it is less likely to lock the wheels, but it does depend on how your vehicle operates and whether you have the option to adjust the strength of the regenerative braking. It is possible that in certain conditions and with the regen turned up to the maximum the wheels could lock, and in this situation adjusting the level or regen or even gently touching the accelerator may be less intuitive than releasing the brakes, so we would advise caution and to use lower level regeneration where possible.