I've just ordered my S85 with delivery scheduled for "November".
Yesterday I got a call from an inside sales rep telling me that Tesla has decided to offer the twin charger separate from the high power home charging option. The price is $1,600 (Canadian). I must decide by the end of the week if I want this in my new car.
Apparently there are a lot of 90 amp charging stations being deployed across Canada and the twin charger will get the most from these.
This does sound like a useful piece of future proofing, but I thought I'd ask the group before making my decision.