I use boxed mixes ever since I moved to states, only because I live at high altitude, and I find baking from scratch here can be very inconsistent.... I don't have the time to do that!!!
However no pan goes in my oven without a liner... another time saver...that way I have no problem with sticking.
I love scratch baking but I have never had a problem with cakes made from mixes. I say it is what ever works for you where you are and your own time or *Children* constraints are lol!