Sometimes an item exists just to be itself. A yearbook doesn't have any value if it isn't yours, or if you don't invest it with some. If you decide you don't want something, fine – but it seems very strange to keep around a formless simulacra of it.
Scanned copies are a lot easier to 'take out' and browse through.
A fujitsu sheet feeding scanner has been the single most liberating device I've ever owned.
When you cut apart something like a yearbook to scan it, its almost a religious experience. In faith, you sacrifice the book's corporeal form so that its essence can ascend into the cloud and live forever.
My main reason for wanting to downsize was because I didn't want to bring a bunch of clutter and stuff into my new home and life because I was starting a new life in a way. There was something appealing about having a fresh start. I still have this where when we have moved homes, I get very interested in downsizing again. It's the lure of the fresh start and getting rid of the clutter.
Another reason was because I wanted clear up some personal mental and emotional energy. I think in a way I was tired of how attached I was to some of my stuff because I recognized that I was still getting my identity from what I used to do. When the reality was, those things were not a part of my life anymore. For example, one of my first jobs was as an editor for a very small publication. I held onto every single magazine I was a part of. I think I was sick of holding on to my past and I wanted to move on. It isn't that I wanted to forget my past experiences, I just didn't want to find my identity in it anymore. Getting rid of the stuff helped me tremendously with that.
Take good care.