It isn't just a warranty thing, the new cars have so much more range, performance, standard options, efficiency, and the price has come down so far.
You could push a P85 over $100k US in 2014, Today a $75k US car crushes it in all categories.
Today if we assume a P85 has 242 miles of max range which I think is average to slightly good, a new S LR has 65% more range, is AWD, has AP, has better suspension, vastly improved MCU, efficiency has improved so much, supercharging is mich faster..........
The only things the vintage cars have on the new ones is RWD driving feel and available higher amperage AC charging.