Disagree slightly with audio quality for cars. I recently got a car with "good" speakers and the difference from regular car speakers is striking. Although I'm sure that the curve quickly flattens on spending more to get more quality, going above the base car speaker level has been awesome for me.

I think the point is that when you're driving (at least in a combustion engine car), the 60-70dB noise floor is so high that it almost doesn't matter how good the speakers are in an ideal silent, soundproof chamber.

In cars it’s also important how good it isolates you from the engine and external noise like wind and wheels on the road. Some cars even have noise cancellation for that.