Do you have any ideas or suggestions about how you think it should work? I'm on the fence in terms of deciding whether we need a full blown saving system or whether it can be a button to save the current environment as the default to be applied on boot.
The most basic approach would probably be to have a checkbox in the configuration to autosave and load the environment. It could be saved whenever the autosaver normally triggers, then loaded whenever it restarts, effectively meaning restarting just doesn't clear the environment settings. The deciding bit here would mainly be people who frequently repurpose their server, occasionally jumping back and forth between gamemodes. I think the basic approach would work for a start, however, by leaving the functions to save, export, and load environment settings easily accessible, someone might take them and expand them into a more advanced system, or even something simple but easy to use like the usual numbered favorites buttons. If that happens, you could add in some support for things like environment file uploads on your end, but that's really dependent on demand for such a thing.