Could you cast normal, everyday business practices in a more negative light? Sure there are companies out there that are deliberately misleading but I don't think Tesla is one of them.
All companies that want to survive have to do some sort of innovation. At one point or another what is current gets replaced by the latest and greatest. Companies have to make the choice when to do that and, regardless of day they decide to do it, someone will end up just on the other side of that line. That doesn't mean the company was keeping anything a nefarious secret, or that they specifically targeted anyone, or that it was anything other a regular business decision. The same thing happens thousands of times a day with just about anything else you can purchase. The only way to avoid it is to perpetually wait for the right time, so you can go ahead an do that, I'll wave as I drive by in my new car.