I want the ability to receive DAB stations in my car. I happen to like BBC7 and so on.
I want the ability to play MP3s from a reasonable size storage. (A few gigabytes would be fine) No, I don't want to have to plug an MP3 player in: I'd be happy with the ability to put a USB drive in the glove compartment.
I want to be able to use the existing steering wheel controls to be able to change track or station or whatever.
That's all I think I want. I don't actually need the ability to play a CD. Or a cassette.
So why is it so hard to find the right product?