@Kruggerand Tesla is not already successful. They have a long way to go in going from the early adopters who have bought a tiny number of cars to the mainstream. They aren't profitable yet and have financial multiples no different than any startup. They are just arriving at the chasm that can make or break companies. There is a limited market for a car at this price point and a huge challenge at meeting a mass market at the Model E price point. As a potential buyer, I really hope they can make it as I will be dependent on their success. It is easy for buyers and companies to get fooled into complacency. Witness Betamax.
Gotta say, you're pretty wrong here. Whether you consider Tesla "successful", that is an opinion without a concrete definition of what successful means. But I'd say garnering Motor Trend's Car of the year, Automobile magazine Car of the year, the highest score Consumer Reports has ever given to a car, the best safety score ever achieved by the NHTSA, outselling all competetive brands in many markets, and many other accolades would go a long way toward "successful".
As far as profitability, Tesla's already making tons of cash. That's why they paid off their loan early. We're talking on the order of 30% gross margin on every vehicle. That's huge. Of course, because Elon is a good businessman, they are investing that money in infrastructure (Superchargers, service centers, showrooms, battery factories) to build the company, but no matter how you look at it, they're making money.
They could slow R&D, Supercharger expansion, or any of those other items and show a much bigger profit, but they don't need to.
The company that wants to be successful today would stop those other expenses and start raking the cash in as pure profit.
The company that wants to continue to be successful tomorrow invests it into R&D, infrastructure, manufacturing capacity, etc.
But make no mistake--they are definitely profitable.
And if you think comparing them to "any other startup" is valid, you're wrong there. They're not any other startup. They're not just any other car company. Their product, technology, and infrastructure is far ahead of the competition. Even if a competing car company came out with a 400 mile EV, where's the charging network? Where's the high-speed charging technology? In this respect, Tesla is already YEARS ahead of the nearest competitor, and every day that goes by puts them another day ahead.