100 pounds for what? Used bulk loaders are fairly cheap today. Cassettes aren't that expensive.

You need to watch prices for the 100' cans. It doesn't seem to be the deal it used to be. There are other reasons to do. It's easier to store a 100' can of film in the freezer then 18 rolls of film. You can load whatever number of frames you want. Others I'm sure. But it isn't the money saver it used to be.