The reason is that if I'm working on a design and go away, I can't shut the computer down. It has to go onto standby.

After working on Microsoft Teams and 365, they force you to get used to using a Cloud. So unfortunately, the openjscad.xyz system feels a bit clunky in comparison.

Please consider at some point adding Cloud Load/Save if there is enough user interest.

Here's a discussion about a Javascript code snippet where something similar is implemented.