The only uses I have found for 220:
- when Agfa was a major player in film business, I loved their Optima line. When AgfaPhoto went bankrupt in 2005, the Optima 400 quickly went out of stock and the 220 5-packs were the only ones remaining in the stores I checked. So it’s not a use, but a reason for which I bought 220 film… and also to save on shipping for some foreign orders where adding a box of 120 was more additional shipping than switching one box of 120 for one of 220.
- the Rollei film back (not magazine, there is no draw slide on this one) for SLX / 6000 series that has a data module (from Nikon IIRC) uses the same mechanisms as a 35mm data back, i.e. it illuminates the data through the film, which means that film cannot have paper backing, i.e. it has to be 220 film.
- Traveling with fewer films in my small bag when I know I am going to shoot many pictures and am very space-limited.
Other than slowly depleting my stock of expired film and using that old data back, or reducing travel volume (by not much), I don’t see much use for 220.