We were talking about old cars with high likelyhood of DIN size standard radios.
But you are not wrong, car manuafacturets started to make uniquely shaped radios and later infotainment systems that you pretty much can't install aftermarket ones, and having all controls in the single unit is dumb, and touch screens are even dumber, i never want that to my car. I love my buttons!
And if you want connectivity or infotainment you can just install an aftermarket system, still not anywhere as near invasive as new cars integrated ones
For me it makes the sink for stream audio but wires my mic to it instead of the app or desktop audio, gotta rewire manually. After that it works
On wayland (KDE Plasma) it's not as seamless. For me it creates two sinks, one of which is voice channel and other is the stream audio stream. It wires my mic to both automatically and i have to manually wire the app audio to stream audio sink. So it does work with extra steps. I use qpwgraph for wiring.
And Vencord has a desktop client "Vesktop" which works like Webcord, with audio in stream too. No presence detection but notifications have worked for me
I have no experience about more complex infotainment aftermarket systems but if it can connect to android and add functionality that way they not obsolete as fast. But pretty much all tech nowdays has planned obsolescence which sucks