[MegaBlues]

The reason food doesn't stack is because, way back when, Dev asked if people wanted it to stack or if we wanted food percentages to be able to vary.

Unfortunately, Encumbrance wasn't a thing back then, so people voted for varying food because why not.

Considering the Portable Kitchen and exactly how much you -need- food to tackle higher level dungeons for serious leveling, overhauling the way food works would be worthwhile.