From the user's perspective though, however safe is GrapheneOS, the banking app won't work, Google Pay won't work, Google Play asks a good bunch of questions and might work only some of the time, and the bootloader cannot verify the OS, it will say that there is something unknown on the device, on every restart and powerup.
I know what I'm doing so I don't mind these at all, but they need to be considered when planning with GrapheneOS.