I'm fighting with myself internally about this issue.
On the one hand, I'd like to get rid of the clutter and live more simply. Fewer kitchen gadgets, pairs of shoes, I still have a lot of my baby toys in the attic "just in case". I hate all the junk we have sitting around. HATE IT.
However my dad was something of a hoarder of "useful" items (glass jars, bits of scrap material, etc) and being raised that way and also now living in his old house makes it really hard for me to get rid of those things. Because as much as I hate to say it, some of the random crap he's kept has come to be pretty handy! Plus boyfriend and I are mild preppers, and I like to have spares and extra stuff on hand in case of something like a natural disaster.
This was something I was going to address in my post earlier. A lot of stuff I have is for the same reason as you, just in case. I like to be self sufficient in my garden so I have lots of jars and bottles. We have evacuation boxes at hand in case of bushfire (we are in a rural town in a high bushfire risk area). I sometimes run a market stall and sell my produce or craft items, and I need to store them between markets. It's hard to prioritise!