Kata containers sound interesting, but the first thing that hits you when checking the "learn more" section is the fact that the latest entry in their "news" section dates back to January 2019. Is the project still maintained?
Yeah, I think it's strange that no one wants to improve on something like this.
I can see a lot of use cases where you would want to just use one kubernetes cluster but have support for multi-tenancy with pods being isolated.