In my case, i´ve lost all the cads, renders and digital stuff of 5 uni years (laptop and backup hard drive stolen)… Now when i’m on my way to make my first portfolio, i’m going to re-do some of the school projects but unfortunately, not going to be able to compare and show all the improvement through the years…
I agree on re-doing when you really evolved as a whole designer, not just the “illustration” facet.