The crosvm and Rust have me intrigued. I was hoping for something like this since I saw the first hints of Rust showing up in ChromeOS in crosvm.
A compare/contrast with Kata Containers would also be interesting. Their architectures look similar. (Kata Containers [1] being another solution for running containers in KVM-isolated VMs, that has working integrations with Kubernetes and containerd already. Not affiliated, but I'm tinkering with it in a current project, though I'm also now keen to get `firecracker` working as well.)
Obviously, if nothing else, qemu vs crosvm is a big difference, and probably significant since my understanding is that Google chose to also eschew using qemu for Google Cloud.