Thank you for that link and Thank you to Mozilla for doing those tests. I always suspected something like this but it is good to have it tested and in writing.
My only gripe with the article is this:
All of the car brands on this list except for Tesla, Renault, and Dacia signed on to a list of Consumer Protection Principles from the US automotive industry group ALLIANCE FOR AUTOMOTIVE INNOVATION, INC.
Renault and Dacia aren't available in the US, so there is really no need for them to sign those principles. Which makes Tesla the only one where this is relevant.
They're sensible cars, do what they say on the tin and aren't too expensive to buy and repair. Back in the days I wouldn't buy them and preferred Japanese for reliability but I hear in more recent times they've become much more reliable as well.
So it is kind of strange to hold it against them. On the other hand that doesn't seem to be too important because nobody cares about what they signed or not.