Elon Musk曾称赞电池交换是零停机时间电动汽车“充电”的最终解决方案，著名的是在2013年年中展示了一款S型车的现场交换——但随着特斯拉专注于构建高速增压器网络，这项技术有点落伍了，终于在去年底在加州的一个车站呜咽着发射了。

现在看来，掉期基本上是一到即死。在特斯拉今天的股东大会上回答一位投资者的提问时，马斯克对当时的情况非常坦诚：

We have the LA-to-San Francisco pack swap capability in place, and I believe all Model S owners in the California area have been invited at this point to try it out. And what we're seeing is a very low take rate for the pack swap station. So we did an initial round of invitati***, where we did basically like 200 invitati***, and I think there were a total of four or five people that wanted to do that, and they all did it just once. So, okay, it's clearly not very popular. And then we said, okay, let's expand that invitation to all customers, but I would expect that all customers roughly behave like that initial sample group.

It's just, people don't care about pack swap. The Superchargers are fast enough that if you're driving from LA to San Francisco, and you start a trip at 9AM, by the time you get to, say, noon, you want to stop, and you want to stretch your legs, hit the restroom, grab a bite to eat, grab a coffee, and be on your way, and by that time, the car is charged and ready to go, and it's free. So, it's like, why would you do the pack swap? It doesn't make much sense.

We built the pack swap into the car because we weren't sure if people would want to choose the pack swap or not. We thought people would prefer Supercharging, but we weren't sure, so that's why we built the pack swap capability in. And based on what we're seeing here, it's unlikely to be something that's worth expanding in the future, unless something changes.

For the Superchargers, as we said in the initial press release, the Superchargers are free. It's basically free long distance for life, forever. So free long distance forever is what the Superchargers are providing. Now, there are a few people who are quite aggressively using it for local Supercharging, and we will sort of send them just a reminder note that it's cool to do this occasionally, but it's meant to be a long-distance thing. But it is free long distance forever, and it's basically built into the cost of the car. And based on what we're seeing in terms of the economics, it looks quite supportable.

当然，“样本组”中摄取麝香的不良现象是人为的低。本站仅预约换乘；没有人预约给汽车加油罐加油，所以难怪没有人定期换电池。实际上，如果互换基础设施建设得足够充分，增压器和电池交换都会有自己的位置——在小区角落的服务站停车，几秒钟内获得全充电，可以说是可以说的——但公司只有一个试验站运行，离建立这个网络还有数十亿美元和数年的路程。对于一个有着许多优先权、巨大野心和有限资源的公司来说，互换是低挂的水果。

马斯克还提到，第一批Model X的交付时间只有几个月；考虑到他的矛盾心理，如果他们完全失去掉期支持也就不足为奇了。