Freestyle has really built with this in mind. We propose a primary architecture built around declarative configuration of the vm with a git repo as external source of truth.
If the VM crashes/you have another idea/you want to try something else it should be reconstructable from outside of the VM.
However, I think this is potentially unrealistic. While it is the ideal architecture, I hear more and more every day people who just want to have the VMs run for months at a time.
CI Builders/QA Agents can do this very well. User session starts, bring VM up with content + dependencies, when session is done throw it away. Keeps it clean, debuggable, fast and cheap.
