Re bones. Not too many years ago I tossed out my reusable film canisters that I used to load b+w film in. I used to buy bulk 50 or 100ft rolls of tri-x, or hp5 and it was the cheapest way to shoot. We used to buy boxes of I think 50 rolls of b+w 400 asa film back when we did b+w press stuff, and I eventually gave up on self loading as my cannisters started to get a bit iffy for the ends to loosen if dropped, but had kept the best ones for no real reason.
i also finally got rid of some 4x5 dip and dunk tanks and holders too.
I don't think I ever ruined an entire roll by opening a back, certainly not any jobs or important personal work, but a handful of times we had the lab mess up some e6 chemicals so some slide film got messed up. We shot a lot in transparencies for magazine work, and I was a fast editor with a loup and a light table.
As always, funny to think of that era and how already it's been quite a while...