How else would you save state between program runs? Config files don't preclude the application from having the ability to modify config from within the applic

How else would you save state between program runs? Config files don't preclude the application from having the ability to modify config from within the application. Not having config files (or some equivalent) does preclude saving state. Do you think it would be better to save state to a database or binary state file? I do not think it would be better. I prefer YAML config for most everything.