The ability to add a "Notes" section to a project. For example, I have a project that is carved with a "green" mill bit, IE one that sends the debris downwards. There is no option to select such a bit, and so I select the "blue" one that has the same diameter. Sometime I forget and mount a 'blue' bit when re-carving this project with disastrous results.
Another project has me mounting the piece to the waste board in a non-conventional way.
I think a notes section could be a good way to remind one of anything special or unusual about that project.