"Older junk cars" almost always have a single- or double-DIN form for their radios, and aftermarket radios are available for ~$50, so it's not like they can't get other forms of audio.

Even if you only have to buy a plug-n-play harness and insert a coat hanger into a hole to get the old radio out DIYing something like that scares most people and a $50 radio install will probably cost $50 or more before the200% markup on the adapter harness the shop bought on Amazon for $5-$15. Just figuring out how to use typical automotive connectors is a major task for someone who's never done it.

It's a low priority for most people, costs more than you'd think if you don't DIY. OEM radios tend to have pretty good ergonomics anyway.

Most early 2000s and older stuff has a cassette deck anyway so a $3 adapter lets you plug in your phone.

> OEM radios tend to have pretty good ergonomics anyway.

I'm appalled at the UI for radios these days. Obviously feature overload has a lot to do with it; I wish someone would make opinionated car stereos like Apple does for other consumer tech. "You don't want this feature because the tradeoff is more complexity."

I'd rather have, "We know some of you want this feature so we spent considerable time giving it to you without the complexity."

That's obviously better but often not possible when taking into account the constraints of a single DIN.

If a single DIN radio has a pop-out screen, it isn't constrained any more than a double DIN, and if it doesn't have one, the amount of possible complexity is rather limited.

> ...the amount of possible complexity is rather limited

Relative to what a person can handle while driving, there's far more potential complexity, and as with nearly all things electronic, spec sheets/feature lists often trump common sense limitations.

A call center rents space where I work, by definition knowing their rate of pay, they're all poor. Their cars might have unrepaired crash damage, or mufflers held on my baling wire, but they have nice rims and nicer car stereos than my own.

Its a cheap extra luxury at the poor person level. Much like very expensive tennis shoes are a thing in their culture.