I think they refer to that as auto-backup rather than autosave, but now that I understand your concern, I second your suggestion
It's a GREAT
For a long time I've been frustrated that the program will lose changes you've made if it locks up. I've stated this problem, but don't recall anyone ever suggesting the auto-backup feature. I find it VALUABLE on my spreadsheet and word processor, and it would be equally VALUABLE for DeLorme to add this feature.
One of the other long-time users stated recently that all you have to do is go to Map Files and save from there, but I personally don't trust that method. I've developed a habit of closing the program and reopening it on a regular basis, ESPECIALLY when I beta test, so as to NOT lose what I've just done.
You could do a new suggestion note, if you like, with a POLL asking people to vote on auto-backup (or auto-save) on routes, mapfiles, draw files, gpl files, and see how forum members vote on it. The results might be interesting.
As David said, the gpl files need to be saved at time of a crash so we don't lose them. On my atv or walking with my laptop, I've found that to be a serious problem in mapping our 130 acre farm.