Most OEM infotainment sucks, and it's taken a while for things to improve. I'd be willing to say your older car has a resistive touchscreen and physically couldn't support multitouch
CarPlay is definitely an improvement if you're comparing it to something like Ford Sync for example
This wouldn't be a solution to the argument in the article: Rivian and Tesla don't want to support phones projecting to infotainment
As it is, CarPlay is implemented as a h264 video stream which receives touch, microphone, and metadata from the vehicle, the protocol is fine albeit proprietary
As a owner of a GM without android auto, never again. Everything is on my phone but I can't safely access it while driving. Also can't legally because my state makes using the phone while driving illegal (for good reason. I suspect most states don't allow it)