I'm all for it, but it would have to be an option, since it would become annoying with big documents.

I'm currently working on a document that takes at least 5 seconds to save.

A more viable solution to eventual crashes could be to save a list of your last actions on the document. In practice, to recover the history window, if Illustrator had one, like Photoshop, a feature that I already requested myself (just having the history window, not recovering it when opening a document).

If I understood correctly, Alan Cooper briefly suggests this in his great book on usability, "About Face". I'm not exactly a geek, but I think that's what he means when saying "saving the undo buffer". Perhaps Illustrator could just save the list of what you did and did not save, and then execute all those lost steps when opening the previously crashed document. Anyway, he wrote that and a whole chapter on "Rethinking files and save (or something like that)" some 10 or 15 years ago, so don't expect Adobe or any other company to actually do it in the near future. Because this guy is a programmer, and that tells me that this sort of stuff was already possible in the 90s.

And by the way, you're lucky if they even read your request. Just take a look at my last post and its date and take your conclusions.

Cheers!

YES!! Illustrator crashes without warning often and I find myself often supremely frustrated with the instability of the program. I work with this program for my profession and work under sometimes very fast deadlines where every minute matters. losing half an hour to an hour of work can be devastating. 

Photoshop has added auto-recovery and has saved me many times as that program is somewhat unstable as well.

There are so many factors that could lead to a crash it just seems like auto-recovery would be a fantastic fail-safe to mitigate the issues caused by these unpredictable bugs.

I really really hope they add an auto-recovery feature to illustrator.