My DH is much more organized than I am, but not very computer-savvy. He has insisted that I keep a list of accounts, passwords, etc in a file folder at the front of the file cabinet, and that all the kids know the folder exists. It really is a good idea, in case of anything happening. I try to go through the list once in a while to make sure everything is valid.
Even all the household bills; the companies are trying to push to online-only, but I do like to get statements so have resisted most. When my dear MIL died in 2021, I was not the executor, but there were a few points cards I was given to try to do something with. Luckily I had the password for one of them, so managed to either transfer or cash in some of the rewards which I either gave to charity or family.
Any yes, what to do about all the memory boxes? I have quite a few photo albums and boxes from my parents, from post war to the 70's. Do my children really want them, when they don't recognize most of the people in the photos? I don't really know the answer, and I'm afraid my DD will end up with too much stuff of ours to deal with, but don't have the heart to get rid of it.