I had a 2014 Model S and experienced a smooth ride with no powertrain issues. I’ve heard similar feedback from other owners of post-2014 vehicles, most of them report fewer powertrain failures. Tesla seems to have addressed these early issues with newer models, focusing on improved reliability...
Does it matter anymore? You are good now. In case the issues will get back, try again the same method. Though, if those get back, I think a visit to the dealership is mandatory.
I recently got a new Model S Raven edition with a 373-mile EPA range. After charging to 100%, it only shows 359 miles. Is this normal for a new car, or is there already some battery degradation?
It's not just Tesla, you understand. Headlights are extremely expensive on high-end cars such as BMWs and Mercedes. And the dealers only want to use the most expensive parts.