The trouble with chest freezers is they are a pain to get things from the bottom of. What I've seen happen is stuff remaining at the bottom of the freezer for years on end, eventually becoming freezer-burnt. But if you can automate the stacking and unstacking of things, this could be a good idea. You wouldn't even need the entire top to be openable (or at least, you wouldn't typically open the entire top), there could just be a smaller port for pulling things out of.