What do audiophiles do in their cars?


All of you forum members with your killer home systems…what do you listen to in your cars?  Do y’all have custom stereo systems?  Does the quality of the stereo system actually impact your car buying decision?  I have a B&O setup in my 2021 truck, which was an upgrade and sounds decent enough, but nothing compared to a typical HiFi home system.
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While driving Apple Music or Tidal via onboard system… I don’t expect any good sound from it.. mostly focusing on lyrics and meanings…however, I also keep my Dragonfly Cobalt with Sennheiser HD 650 in my car and when I have to wait, for example, for my kid at the practice I’m actually using this mobile setup for better sound. 
First thing I did to my 2015 911 GTS was to upgrade the sound. 
Kline headers and IPE cat back exhaust was like upgrading to TEKTON Speakers and $3k isolation platforms!!!!!  ;)

Better sound than anything on this forum. 
+1 dekay Up here in No Cal

When alone I tend to turn it up and listen to Qobuz or the ancient Ipod.

In the past I have put in better systems. But. 

A dream car would be a burmester car audio system in an electric Mecan. Just saying.
Focal separates, 3 old school  Fosgate DSM amps and a JL Audio 10W3. Using an active crossover. Doors lined inner and outer with Soundskin along with the trunk.
"Tweeks" (long explanation) and sound deadening has made the factory installed stereos in my late model cars much more listenable.
I don't have stereos in my old/vintage vehicles:
a) can't hear them anyway via wind/road/motor noise
b) want to be able to hear when parts from a 50+ year-old-car fail or fall off the car completely