> A very well written dead-end but a developmental dead end nonetheless.

Why is that? Android being open source, GrapheneOS could fork if it became big enough?

> GrapheneOS developers won't support other platforms

Official partnership with Motorola doesn't count as "other platforms" for you?

> "security" features

Your using quotes for "security" probably explains why you're fine with Murena.

> Trusted computing the nail which seals its own coffin and locks anyone out of running their own OS.

I don't understand that. Do you believe GrapheneOS locks you out of your own OS? GrapheneOS is open source, you know that?