I am just lucky to have the number of backs I have, in A12, A24 and the one A16, so I can preload several backs, and even different films for situations to image, plus, if and when I am able to find and able to find an affordable A70 back or two, I can start using the old 70mm Tri-X I have as well as FRESH, HP5+ when it's put out there again.
Because I worked as a freelancer, and an assistant for some time, I was able to cope with reloading/unloading different Medium format cameras under situations that many would find quite stressful and still be able to manage several important tasks at the same time. This and my previous Hasselblad kit gave me the tools I need to consider all my options in a moment and more importantly, the ability to slow down the processes in large to small formats to do the job properly.
If any of you younger shooters, has the chance to assist and work for a professional that still uses film, you can learn a lot by doing so, which can really sharpen and temper your situation awareness when rushed, stressed and confronted with choices of how to plan and pack for a longer shooting, on the road, for your boss and yourself. You will also learn how to handle models, stylists, hair, clothing, makeup and product etc and correct myriad misadventures in seconds, so the best possible image made.
IMO.