Do you have an option to start up with a clean and fully patched system each time and not retain state? Can users have a library of machines for different purpo

Do you have an option to start up with a clean and fully patched system each time and not retain state? Can users have a library of machines for different purposes? I am thinking that something like this could be valuable as a secure and disposable space for someone living or traveling in a risky location. Have you tested it on a phone with an external display?