@thestrangelet RCS messaging is indeed a bit problematic right now. It used to work for the most part and then Google made some poorly documented changes to how they implement RCS which made it lose compatability and difficult to restore it. RCS works for many, but is still broken for some. Note though that there are also reports of RCS not working for some people on the stock PixelOS, so it isn't entirely related to GrapheneOS. The project has said that it's a priority of them to restore this compatability, so they are aware and working on it. To be sure though whether you have configured it in the way that makes it work for most at this moment, can you verify that you have set it up according to the instructions in the release notes of release 2025092700 ( https://grapheneos.org/releases#2025092700)?
Regarding Android Auto you are correct. It has downsides, which GrapheneOS just can't workaround. So it's there for compatability and people can then make an informed choice about the trade-offs. If I owned a car, I would do the same as you and opt to not use it.


