Adding Apple CarPlay or Android Auto to older vehicles is easier than adding it to a newer one. On a newer vehicle you have to worry about car systems like the AC, seat controls, etc being integrated into the infotainment system. On an older car with a single din radio (w/ cassette deck or cd) you can just buy an off the shelf radio that has CarPlay and Android Auto.
Yeah but that’s just one example. As much as I like to imagine myself as a practical driver who might want to do performance driving or whatever, in reality I like all the creature comforts of a modern car.