I think its the nature of the hobby. We keep stuff we think is good, and put it someplace safe. Then one day we look for where that "safe" place was and can't find it. frustrating.
Then one day we are looking for a different part, and can't find the "safe" place we put it, but we find the last part we looked for the last time but couldn't find. The problem is, we don't need that part now, so we put it someplace else that we are sure is a safe place.

Throw in a move, or a disaster when stuff gets moved in a hurry, and the "safe place" plan, as poor as it was, goes right out the window. Then the stuff arrives in the "its here someplace". That is the point where we realize just how much storage space we have. That is how we get 2nd and 3rd backups of parts we think we are going to need. I know its here someplace. I've run across things I was looking for 3 years ago, but usually we fine that 1st replacement part right after we bought another one.

It gets worse as we get older.