The sad truth is you might be right. At a former company we had wear leveling in the firmware of IoT devices that would cost under 20$/piece so the fact that a car lacks such a basic feature, is shocking and tells me all I need to know about the development practices at Tesla.
As a firmware engineer with automotive background, having now seen how the "sausage" is made there makes me stay away from them for the safety of my own life.
I know the rest of he car manufacturers aren't as innovative or as desirable but at least some I worked for have their firmware development quality processes down to a religion, and, as boring as that may be, it's the kind of mentality you want from something you put your family into every day.
It did have wear leveling. They were just writing such an ungodly amount to it (more than the 8GB capacity) per day it defeated the purpose of wear leveling.
