> I'd love to see Google Doc's revision history applied here so I don't have to worry so much about losing my work.

We store all changes as diffs. :)

http://clara.io/learn/user-guide/basics/interface_overview/h...

Technically we can restore any version of the file that you want or tag revisions (like you can tag code revisions in Git.) We have not yet exposed this in the UI though.