>GrapheneOS is not solving the actual interesting problem
Consumers don't care how interesting the developer's problems are. They want their own problems to be solved and GrapheneOS does a better job of that.
>running on an entirely mainline kernel
Google already did that work years ago. Android will work on a mainline kernel. Just like with x86 the mainline kernel needs to support the hardware e you want to use though.
> and GrapheneOS does a better job of that
While Google is allowing that.
> Just like with x86 the mainline kernel needs to support the hardware e you want to use though
Librem 5 runs on all free drivers. This is why it will never be tied to an old kernel. This doesn't work with GrapheneOS.