> Many people use phones with years of missing security patches

Right, yeah that's actually a good reason to use GrapheneOS.

> It doesn't specifically need to be a GrapheneOS device, but it's a good choice in general and doesn't require being technically savvy to use or even install it.

I totally agree here. Very good choice, and I would argue that a "normal" person wouldn't make the difference between GrapheneOS with sandbox Play Services and stock Android. Installing may be intimidating, even though the GrapheneOS installer is extremely impressive (it just works and doesn't require any knowledge). Still normies tend to get intimidated just from the idea of reinstalling their system :-).