Except that Tesla is now producing at a weekly rate equivalent to hundreds of thousands of cars per year at their Fremont factory, comparable to other car companies.

But they're still ramping up. The factory will be outputting something like 500,000 to 700,000 cars per year after they're done ramping. They'll need Model Y and/or Semi and at least another factory before they're going to be comparable to other mid-range manufacturers. They'll need at least half a dozen factories to be a major manufacturer. Or they'll need to change how cars are made entirely.

If they can get millions of cars from a single factory, then the high automation that they're shooting for (and which Model 3 had to back off of) might make sense (and is required for getting that kind of production from a single line). But even that will likely need multiple factories to justify the R&D into the factory line itself.