My wife and I are very excited about the prospect of purchasing a Tesla. However, much of our driving consists of 160 mile highway trips between Boston and the White Mountains, and I often find myself fawning over having adaptive cruise control for that highway driving. I believe this would make our trips more pleasant and more safe, and as someone who drives cars until they die (currently sporting a '96 RAV4), I would hate to purchase a car and miss this feature by a year or two. I was wondering if Elon or anybody else from Tesla has commented on whether or not such a system, when it is brought to market, will be available as a retrofitted option? If not, if anybody from Tesla is reading this, we would greatly appreciate if you could offer some commentary. We would be much more comfortable purchasing a Tesla if we know we won't be locked out of this technology when it becomes available. If others care to speculate we'd love to hear that, too.