"Scaringe highlighted that CarPlay‌'s inability to "leverage other parts of the vehicle experience" would necessitate users to exit the app for certain functions, such as opening the front trunk."

or you could like... add a button for the front trunk.

https://www.macrumors.com/2024/07/23/rivian-explains-why-no-apple-carplay/

Rivian CEO Explains Why Apple CarPlay Won't Come to Its Vehicles

Electric automaker Rivian has no plans to introduce support for Apple CarPlay in its vehicles, founder and CEO RJ Scaringe says. The company's...

MacRumors
@geerlingguy he was also explicitly asked about next gen carplay that makes it possible to show car ui within carplay.
@hagen sucks, I wanted a Rivian some day. But, I’d rather find a vehicle that works easily with my phone.
@geerlingguy where have all the buttons gone
@geerlingguy never gonna buy a car that doesn't let me use my phone apps. It's too much hassle especially on rental cars. The experience I had with a Dodge rental that didn't have android auto was terrible. I was in the lot 20 minutes trying to figure things out.
@geerlingguy I wonder how long term support and interoperability is going to work out.
@geerlingguy A *BUTTON*‽‽ And ruin the beautiful lines‽ How dare you!
@geerlingguy And miss out on the opportunity for an unrelated third party (Apple) to remove access to one of your vehicle's features in a future 'update' to CarPlay? This is our lives now, we must accept that nothing we purchase or rent will retain its current level of functionality for any predictable period of time.
@geerlingguy I think his reason is very weird. I tried a new Ford not long ago that ran CarPlay in a window like setup. In window mode I still had access to all the other car stuff. It even allowed me to resize the window and run full-screen.
If ford can do this, why can’t Rivian and other manufacturers? 🤷‍♂️
@geerlingguy might present a huge security risk. Imagine a "bug" or something... while you're driving on the freeway.
@geerlingguy My Chevy Bolt seamlessly switches from its own UI to CarPlay. Never am I confused over which is which. This is a bad excuse by Rivian. I wonder what their real reason is?
@geerlingguy I don’t really get it. If you are in the native maps app, to get to other functions, you have to leave their maps app. How does that differ that much with being in CarPlay maps and going out, for other functions?