Double tap on the burger menu (top-left) saves a snapshot of the current project
Or maybe triple tap, for safety.
And the snapshot consists of nothing more than saving a copy of the current project (without leaving the current project), with a timestamp appended to the name, in the same folder as original (this should only work for files you opened, not new files that don't have a name yet).
I mean climbers keep setting those hooks for the rope as they go up. I keep saving versions of my patches whenever I want to try something new, but I end up with projects named superconga.5.3.7.2x
This would also help prevent me accidentally erasing racks with my ape paws and remembering I hadn't saved.