I think this is pretty much correct, but Tesla only has to carve out a niche in each market it enters to be successful. They will enter a high volume market so

I think this is pretty much correct, but Tesla only has to carve out a niche in each market it enters to be successful. They will enter a high volume market soon. Also, the EV feature comes with side benefits of decreased weight and size. For smaller cars this will be a bigger win as comparable gas powered cars have less space to use on passenger satisfaction. So you're missing that in your comparison. How much interior+trunk space does the model S have over the M5?