Background project saving/backup

I know, it’s a long shot. But with huge projects, saving takes a lot of time. It’s becoming bigger and bigger issue every year.

Could we somehow make it possible to keep working, while the project is being saved? Or at least, make it possible to browse/scroll through the content, please.

Maybe making a quick copy of the project in memory somehow would be possible. And then save that, and let the user keep working on the main thing? Just a quick idea. I know it’s much more complex.