Hanging / Storing Onions

It is recommended that you leave some leaves on allium flower bulbs which feed the bulb as they die back, this is possibly where the idea of not bending over the onion leaves came from, and unless someone has hard scientific proof, how can we say what Broadway says is right or wrong, personally I think doing it is too much faff so will be harvesting and drying as I have always done, bending the leaf over and hoping for enough warm sun to dry for storing