This applies to all different fixes and hobbies so well. Just this afternoon my old Miata had the power steering 'cooling lines' finally rust through. Once I got home, I rummaged in my toolbox for old car tubing, rummaged elsewhere to find some small hose clamps and spent at most an hour cutting off the rusty parts, reattaching with line and clamps, refilling, and cleaning things back up. (luckily the cooling loop is on the low pressure side of things, so if it moves fluid a -> b and is kinda sealed up, it's good to go)

Point is: Having the drawers of 'I'll save this just in case!' in all hobbies does in fact come in handy. I find this especially true when some sort of project requires 'yet another adapter' to convert thing a to thing b. Project either goes through or it doesn't, but later on when trying to attack something else, having that little drawer full of weird but useful cables and adapters within living room walking distance sure feels rewarding.