Looking through the GrapheneOS source, the servers may not be Google servers but the system is still designed to phone home. As such, have they solved the problem or is this just another case of "Dont' trust them, trust us instead."
Has anyone succeeded in running multiboot on "smartphone" hardware, i.e., where the user can boot into a choice of kernel/userland. One choice might be Android, another might be GrapheneOS/LineageOS, another might be an OS that does not rely on any third parties whatsoever (no conveniences, "app stores", "connectivity checks", etc.) and is fully controlled by the user. In other words, the third choice lets the pocket-sized computer be used more like a pre-smartphone era desktop/laptop OS. Basic functionality.
Has anyone succeeded in running multiboot on "smartphone" hardware, i.e., where the user can boot into a choice of kernel/userland. One choice might be Android, another might be GrapheneOS/LineageOS, another might be an OS that does not rely on any third parties whatsoever (no conveniences, "app stores", "connectivity checks", etc.) and is fully controlled by the user. In other words, the third choice lets the pocket-sized computer be used more like a pre-smartphone era desktop/laptop OS. Basic functionality.