With all of the ambient noise, good enough is good enough for an automotive audio system for me.
For years I drove vintage muscle cars, service vans for work, and played with sports cars on the weekends. Fairly high ambient noise.
The stock system in my Ranger does OKay with stringed instruments, I mostly listen to classical music when I drive.
If I ever got a car like a Cadillac I would want a really premium audio system.
However, I really want to buy a Wrangler or Bronco for my next car. Lots of places I want to explore with 4WD. Ambient noise level off the chart again, especially with all terrain or mud tires.
YMMV.
A little bit of bias, yes. I have no issue with Benz cars, they build some awesome stuff. I have issues with people being Benz fanboi's just for the sake of being a benz Fanboi. But I ahve the same issue with vintage Mopar guys, Jeep guys, diesel truck owners, Miata nerds, etc.
Love what you want to love, but don't shove it down my throat. Same concept works really well for the three "toxic" subjects of sex, politics, and religion.