It's hard to believe that the Tesla Model S has been around for well over a decade. A lot has changed since the first Tesla EV hit the market in 2008. There were tons of naysayers when it first appeared. Many critics thought the company would go bust. Now, Tesla is probably the first company that comes to mind when EVs are discussed. The success of the early Model S cars, probably has a lot to do with that. In your opinion, what's been the best improvement to the first Model S design over the years?