My car reads USB sticks with MP3s on them (I was telling a Gen-Z colleague this and felt old...). There are external BluRay drives that connect via USB, but then to he able to play audio CDs, either the car needs to understand CDDA, or the drive needs to understand CDDA and pretend to be a FAT32 filesystem of some MP3s (or... WAVs?) to the car.
Huh I also have Subsonic on my home NAS and Symfonium on my phone (connectable via Android Auto). Another Rube Goldberg invention would be to put the audio CD in the drive connected to the NAS, have a driver that pretends to be a filesystem of MP3s but actually encodes the CD tracks (on the fly on every playback, of course!), stream it over the Internet to my phone, that's connected to Android Auto. That's how to play a CD on a modern car!
Huh I also have Subsonic on my home NAS and Symfonium on my phone (connectable via Android Auto). Another Rube Goldberg invention would be to put the audio CD in the drive connected to the NAS, have a driver that pretends to be a filesystem of MP3s but actually encodes the CD tracks (on the fly on every playback, of course!), stream it over the Internet to my phone, that's connected to Android Auto. That's how to play a CD on a modern car!