One thing to consider when you are trying to declutter is whether your circumstances have changed. That item which was previously perfect for your needs may no longer fit the bill.
This was brought home to me last week in a blinding flash as I tossed and turned on a particularly damp and humid night. I had worn this nightshirt to bed and it was sticking to me and I was most uncomfortable.
I made this about 15 years ago when we were living in South Australia. The climate there is much drier and it was perfect. However, the weather here is often very humid and even when it is not spectacularly hot this satin nightshirt is not comfortable. So, even though it is still in very good condition, I added to the bag of goodies to go to the op shop and dropped it off today.
I am in the process of making myself another pair of summer pyjamas from fabric that is in my stash so tune in tomorrow to see them and some of the other sewing I have done this week.