In less than one year of ownership (9 months) and less than $8k miles my $113k 90D Model S seems like a terrible purchase and would be worth a fraction of what it cost. Today you can get a 75D brand new (Shipping with 85k Batteries installed) for $20k less fully loaded and fully charge it and get the same daily mileage. I dont like the way Tesla keeps adding value to existing models to entice new users while continuing to devalue their existing customers. There is no good time to purchase a Model S or Model X because the minute you get it something you paid for will be given away for free to the next buyer. Whether is a higher speed charger or full glass roof it seems the longer you wait to make a purchase the better it is. Heck I bought the 90D and right after picking it up the 100D came out and 3 months later the 90D was discontinued. Its crazy how they make so many changes and your brand new car can be discontinued a few months after you get it.