I've used Carplay in a few cars. Mine doesn't even have it built-in, I swapped in an aftermarket Pioneer headunit that has Carplay. It's worked fine with vario

I've used Carplay in a few cars. Mine doesn't even have it built-in, I swapped in an aftermarket Pioneer headunit that has Carplay. It's worked fine with various sizes of screen. As far as lag, there's some lag when using wireless Carplay mostly IME for audio playback, basically akin to the same delay when using Bluetooth. I've never had nav issues with Apple Maps, but since iOS 16 or so, Google Maps frequently has issues where it stops updating my current location and gets stuck until I force-quit the app and re-open it, so that's a bummer. Otherwise it's been fine. Handy the time I had to use a Kia rental and as soon as my phone was paired to it it was like my own personal car.