Originally, my Delivery Estimator said that both AWD LR and AWD SR were coming mid-year, but then they changed that you LR only. I *assume*, and certainly hope, that AWD SR will be available Late 2018 when the SR base model is available. I plan on AWD SR myself, as I love AWD on my Model S 70D. I have never owned any car before, even several AWD cars, where all 4 tires wore so evenly. The Service Center has refused to rotate them several times because they are so evenly worn.
The only thing I can't be sure of yet is whether Tesla is also going to have the non-glass roof available Late 2018, as I would prefer a metal roof in south Florida. As it is part of the PuP package, I certainly hope I can still get a base AWD without the glass roof before the end of the year.