Cloning & using Qubes with other OS/device

Has anyone got a workflow or experiments where a single Qube/VM image can be booted in another setup?

For my usage the ideal solution would be to sometimes migrate a Qube into a standard Linux environment. I guess that could be done by merging it straight in as files, although keeping sessions and such would be ideal.

Pulling it into Virtualbox or similar could work too, but kinda defeats the purpose of portability into devices with low ram & so on…