For microvms, take a look at https://smolmachines.com
I'm not interested in a VM which supports mounting host filesystems in untrusted Kubernetes pods.
smolvm integrates with k8s (https://smolmachines.com/docs/guides/kubernetes-in-a-microvm...) and can mount s3 buckets (https://smolmachines.com/docs/local/machine-lifecycle-cli-re...).
I wouldn’t dismiss smolvm so fast. It brings together many ideas that make the whole very interesting.
It doesn’t provide isolation. It is not even part of the conversation.