Look at all these rich people in the comments with their car stereos that could play CD-RW. Some of us were lucky to have one that would play CD-R 80% of the time, and it was completely brand agnostic.
I got a Sony CDP once that wouldn't play burned CDs. Not sure if it was a hardware issue with that one CDP, or if it affected the model itself. I returned it and got a different one and it works with burned CDs. To this day it's a mystery
Alright Scrooge McDuck driving your Rolls-Royce with a CD player, any car I could afford to drive still had a tape deck even by the time I had a phone to plug into it via an adapter!
Back then we could pull the factory radio out, and replace it with a new one. And it was easy.
I duplicated CDs for a while for the car, then bought a new car stereo that could play MP3s and condensed my collection onto 3 discs. I left the discs in the car when I sold it
I never had the luxury of an easy replacement, I always had to deal with jank mounts that had to be cut to fit the car and stereo, and then there was the mess of wires to hook up. That's what I get for trying to jam 1990s technology in to 70s and 80s cars...
They went that expensive at least by 2000, I put one in my 99' Neon for like 200$. It actually could play MP3 discs! I had one disc with a shit load of songs that was my default disc in the player.