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14 hours ago
They can't due to the shortcomings of the hardware (why develop a hardened os to the grossly insecure hardware) or the vendor (no/slow updates, etc).
Anyone is free to fork, add the desired hardware support and flash.
(that's aside of some Moto flagships in 2027)
they can, but don't want to
OK, I'm confused, explain how they can deliver comparable security on a hardware that does not offer the same capabilities, from a vendor who doesn't provide patches.
You say they can. How?
The hardware capability that GrapheneOS loves to use as a shield to deny support for other devices is the ability to use custom AVB keys. Without custom keys you can't relock the bootloader after installing a custom OS on most phones. The consequences of having an unlocked bootloader are that you are susceptible to an evil maid attack.
This is a real threat, but the reality is that the average person is more likely to be hacked/spied on from the software side, which Graphene would protect you from as effectively as it does on Pixel.