I think it's obvious that the only reason to have aero wheel at front and regular wheel at rear is budget. I did some research on this and what I found was aero front wheel is more important and rear aero wheel is only to help bike handling despite the fact that most people use deeper rear wheels. Most stuff I read were from > years ago, wonder if anything changed (newer wheels handle better in crosswind maybe, etc.)
Edit To clarify, some information that I found claim that using front only aero wheel results in worse handling than having front and rear aero.
So, can anyone confirm this and maybe someone with experience in using such setup. I want to know how bad handling can be with 50 mm front wheel and regular wheel at the back.