Here is the current situation:
- The Model S is difficult to manufacture and needs a complete redesign. Elon said when they designed the Model S, they were just trying to make it work but when they designed the Model 3, their main focus was to make the production easy.
- The Model S needs a new production line that is as automated as the Model 3 production line. Otherwise, labor costs will remain high and the Model S won't have any chance to compete against the Model 3. Reducing Model S prices is difficult right now and will remain so for at least 2 more years.
- Tesla will make better margins on the Model 3 than the Model S. The Model S has ~28% gross margin. I'm calculating 30% on the Model 3.
- Financially, it makes more sense for Tesla to release a larger battery for the Model 3 before a larger battery for the Model S because the Model 3 is easier to manufacture, uses the new cells, will have a higher production rate and has the more advanced production line.