Everybody shoots roll 120. So do I, BUT 2x3 and 6x9cm sheet film used to be cheap-cheap, so I loaded my freezer up with it, many kinds slowly were gone from the market, often at close-out prices. Anyway way cheaper than today, actually there are big dealers in the UK and Germany that sell fresh 6x9cm at fair current prices. When I loaded up the truck, it only makes sense to me to buy enough to offset the shipping costs, it gets the ship percentage down. And I buy in Winter so the film doesn't bake for days in a black shipping truck. Honeywell stainless Nikor tanks and metal racks hold 2x3 and 6x9 in quantity, need to get mine going. And I have holders galore many kinds, sometimes they come in bundle deals. So I'm set. Metal 6x9cm Plates weigh a LOT!!! but are an interesting and completely different way from shooting roll film, which is still my mainstay when going out. I have found it good to have both. At this point most of my 6x9 plate holders are loaded ready to shoot. I do have some very interesting films from Eastern Europe, again bought in quantity.
For fresh 2x3 choices are very limited. But Freestyle has 100 and 400 B&W and I loaded up on that long ago. I have six 2x3 Graphic Graphmatics and a lot of Fidelity and Lisco 2x3 Holders. They weigh less than the European plate stuff, totally reliable and precise to use. The finest 2x3 film holders I have are the Linhof 2x3 ones, they also work with glass plates and planfilm and are mucho deluxe 🙂