Over a month ago, I hit the 30,000 mile mark in my Model S. One and a half years and 30,000 miles of non-commute driving is a surprising number for me. It took me 4 years to put about the same mileage on the Roadster.
The large difference in driving is largely due to the supercharger network. The Model S is truly a road trip car and is far more comfortable and cozy than the Roadster. But without the supercharger network I would have never driven cross country in an electric vehicle. I simply do not have the patience to always charge in RV parks and level 1 charging stations.
I doubt I will ever drive across country again nor have such high mileage in a year and a half of driving. However, I do have my eye on some future road trips in the Model S.