Tesla has a history of making low volume prototypes that they sell to weird early adopters and then making high volume cars. The prototypes validate the designs without as much potential for a crushing warranty bill if a technology bet isn't great.

For instance, tesla went through several varieties of battery chemistry in the early days of the S before landing on the setup they ended up sticking with for the model 100 and later models.

The CT is a similar low volume prototype of the maxwell technology dry cell battery stuff, 48 volt and "drive by wire" architecture that is 100% novel. They're really better off just selling it to a smaller number of people until they get the bugs worked out. The stainless steel stuff is cute but not the hard part of the CT.