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> It’s the cars which can’t have their head unit replaced with a simple stereo which worry me.

I agree. There's a lot of room for innovation, consumer choice, and competition that was previously guaranteed to be available in those one or two DIN units of space.

I haven't seen them present in any new car I've looked at in nearly ten years, but they were in every car I saw from the 50 years prior.

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Denso head units for Toyotas can play MP3s, but the order of the files is when when they were copied to the SD drive. And you can't sort them any other way.
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The counter argument to that is well designed modern cars have great info-tainment systems which get regular updates. My Tesla gets regular software updates, has upgradable hardware, and won't be subject to these kinds of issues for decades. Old cars encouraged exchanging and needed aftermarket parts because they didn't care or try, so the products were low-quality and often failed.
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> My Tesla gets regular software updates, has upgradable hardware, and won't be subject to these kinds of issues for decades.

Teslas from four years ago with Intel Atom processors and HW3 are already getting different and lesser updates than new Teslas, without any hardware upgrade plan in place.

A Tesla you buy right now is running HW4 which is inferior to current Cybercabs and HW5 has already been announced.

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Legacy automakers are still using the "ship it and forget it" approach. If I want my 2023 Hyundai to have the same features as a 2025 (manual battery preconditioning, Google Maps directions on HUD, wireless Android Auto, etc), I need to root the head unit and install a bunch of vibe coded packages from randos on GitHub.

Although to be fair the vibecoded packages are probably higher quality than what Hyundai would've shipped.

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> well designed modern cars have great info-tainment systems which get regular updates. My Tesla gets regular software updates

And tracks you everwhere you go, resulting in that data being available to hackers, marketers, and any sleazeball that wants to extort you by suing you.

Not unique to tesla, of course, but a property of all those 'well designed modern cars'.

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