Nonsense. The Roadster battery CAN be swapped out. The promises Tesla made to Sig owners were much more specific, namely, en route battery swapping at a roadside station. Playing around with the idea that anything is possible to support the notion that Tesla delivered on this particular promise is, frankly, a silly argument not worthy to be afforded much weight. You are correct about one thing, Sig battery packs are incapable of fast swapping at 100% of Tesla's swap stations.
The Roadster battery can be swapped out it just (apparently) can't be done at the Harris Ranch Battery Swap Station for some reason/s that none of us are privy to, but likely has to do with some sort of engineering change/s between the time of Roadster production and the deployment of the first (and seemingly last) battery swap station. See, I can do it too, it's a true statement but a terrible argument. Imagine if Tesla had implemented Supercharging that left out Sig owners, saying that design specs had changed and the older cars are no longer compatible. Better yet, imagine the reaction if, in a few months Tesla realizes the first Models S sold on the promise of future auto pilot features were not capable of reading speed limit signs and just say they're sorry but there's been an engineering change so that's not going to happen. I don't predict that will happen but it could; anything's possible.
The facts are these:
- Tesla advertised en route battery swapping as a feature on Model S as early as 2011.
- Tesla sold cars to sig owners based, in part, on that promise.
- Sig cars are not compatible with the battery swap station.
Conclusion:
- Until Tesla demonstrates fast swapping compatibility with Sig owners they haven't fulfilled part of the bargained for exchange.
I am a huge Tesla fan. Tesla needs to make good on the wild promises it makes regarding future features when it sells cars based on those features being available later. Those two statements are not inconsistent.