They had a marketing demo of a robotic charger a few years ago, but nothing came of it. They also had the demo of full battery swaps before that, but they'd have to change their entire architecture for that to work.
> In 2013, California revised its Zero Emissions Vehicle credit system so that long-range ZEVs that were able to charge 80% in under 15 minutes earned almost twice as many credits as those that didn’t. Overnight, Tesla’s 85 kWh Model S went from earning four credits per vehicle to seven. Moreover, to earn this dramatic increase in credits, Tesla needed to prove to CARB that such rapid refueling events were possible. By demonstrating battery swap on just one vehicle, Tesla nearly doubled the ZEV credits earned by its entire fleet even if none of them actually used the swap capability.
From Ludicrous, Edward Niedermeyer
A bunch of these claims are understandable with the tech and hype available at the time they were said, but there wasn't enough committent to follow-through. Not that it would have helped much.