The main supporting point made here is about bad CarPlay integration in an expensive car?

That’s a whole systems problem, it could be your phone struggling or your car system struggling, or the communications with both. Bear in mind that Apple doesn’t make your car display system and the even the car maker may contract that out. I’ve seen variable quality in car display systems.

And bear in mind that the car system has to be compatible with Android car software, and typically they also integrate their own software features. There’s a lot expected from car systems and they don’t always perform well.

Also you can have various things running in the background on your phone competing for resources. Just saying.