Implementation still varies between car to car. Example: Mach-e interrupts the song playing and takes many seconds before it resumes. Sometimes this leads to multiple driving instructions preventing the song from resuming for a long time.

Other implementations (looking at you Hyundai) crash requiring you to pull over, disconnect the phone, reboot the infotainment and then re-enter your navigation destination.

The best implementation is no carplay: instead use an AUX port and mount the phone on the dash.

Second best is Tesla's custom navigation. They do something other car companies should: use one of the million speakers in the car to focus on navigation directions while allowing audio content to continue playing on all the other speakers. Such a simple idea but so good.