I wouldn't hold your breath for the Model E. While they have an excellent product, it sounds like Tesla also has an excellent track record for delivering new models late. And there is still the Model X that has to come first.
I suspect they will eventually stay as a niche, high-end brand but collect a lot of revenue from providing tech to lower-end products, e.g., the Smart ev.
Typically when a company wants to play in both the entry-level market and the high-end market, they do so under different brands that they own. In fact, off hand, I can't think of a significant car company that hasn't used the multiple brand approach for targeting the different market levels. Not saying it can't be done, just not likely.
I suppose they could launch another brand - perhaps called the Gauss, Newton, or Pasteur?
Note to Tesla if you are reading this - If you don't already have these names trademarked, better make me an offer. :mrgreen: -jk