Personally I'd buy whatever car I want and add a radio if I cared that much. I'm not so single issue I would force a limitation on myself like that. But then having grown up in the USA from the 70s to now I love cars way more than I love AM radio.
Most new cars are so tightly integrated to make replacing the radio a non-option, at least not economically while preserving the same ease of use.
But they all finally have AUX inputs so you can plug in any portable radio you like.
Sure, but then you have different knobs for tuning am vs fm, different scan buttons, and you have to find a place to stash the box and antenna. I’d consider going through that for something like CB radio, but if I can have it built in that’s clearly preferable.