Looks like all Model S will be AWD this point on. I picked up this news couple of hours ago. Not sure why there is no mention of this on this forum. This will truly differentiate their M3 from their MS and MX.
Tesla, Inc. to Discontinue Cheapest Model S as Model 3 Deliveries Ramp-Up -- The Motley Fool
Tesla, Inc. to Discontinue Cheapest Model S as Model 3 Deliveries Ramp-Up -- The Motley Fool