IMHO, all is good currently.
Stock price is stable (around $200).
I think the biggest danger might be in taking on too many orders and too many product lines.
For instance, suppose orders climb to a million, no, 1.5 million. Then Tesla would be tempted to build another Gigafactory for batteries, plus another couple of factories for cars, possibly side by side in Cal, or in China and Europe. Then a Model Y and a Roadster, pickup, trucks and buses, (and Solar City and Mars). And an interest in Hyperloop and other new toys.
The cost there could become burdensome, with the associated rampups 2 or 3 times, again.
However, if the product is successful, minimal recalls, no fires etc or AP2 deaths, Tesla Motors would be an attractive buy by another co. whether it be Apple, Google or India or China etc.
So IMHO, the health depends on the above successes and always having a saleable product.
That product might well be even 'partnerships' to rebadge as Mazdas of Fords or Fiats etc, or all.
That would achieve Elon's goal of Sustainability, without the requirement for him to produce millions of cars. After all, I assume that is not his real interest, nor his strong suit.
What is your opinion?