> It's suitable for (some) applications, but not for libraries, and a kernel falls on the "library" side of that divide.

I would disagree with that assertion: the kernel is a service that end user applications interact with through an API. Using anyhow in a Rust library that Rust applications use is a very bad idea. Using anyhow in the kernel might be a bad idea, but not for that stated reason.

> Linux has its own UUID infrastructure, so it seems weird to pull in a whole parallel implementation. At the very least you'd want to disable all the generation code, and it's unclear to me if the uuid crate supports that.

The uuid crate can be modified to support the kernel infrastructure as its backend. This would allow the same API to be available within the kernel and in the rest of the ecosystem. That's beneficial to everyone involved.