Should I add OpenShell to an Atomic desktop system?

[gordonmessmer]

I'm interested in including OpenShell in an Atomic desktop system for developers. I have a few questions:

1. The documentation says that using a containerized OpenShell is the best option for Atomic systems. Are there any advantages to running OpenShell directly in the root namespace (i.e. including it in the Atomic desktop)?
2. The "Software Prerequisites" section of the Support Matrix document hints that local image builds and development workflows are only supported on Docker Engine and not Podman? Is that correct?
3. Is rootless Docker Engine supported?