I have for years. Oniginally , out of student poverty, without a bulk roller ala watson etc. Just notches in edge of desk as a length guide for 35 exposures, to match my negative filing system. I would work after dark with a sleeping bag pinned to my room window, and towels stiffed around the bottom of the door.
Now I have a few differnt loaders, and keep hp4, fp4, pan f and formerly, when easier to find, c-41 and e-6 films as well as the former plus x pan and olf trix.
I also bulk roll duping films, since they are only sold in 35mm 100' rolls.
I also have a 100' roll of 70mm that I slit and respool for 120 film ocassionally. Dust control is a bitch though when working without a bulk loader.
Rarely in the last decade have I bought pre packaged 35mm film. My freezer is packed with it though as people give me their old unwanted film stocks.