This has been discussed here many times, usually along with discussions on retirement and downsizing.... My rule of thumb, if you dont use it, wear it or find need for it in a years times, GET RID OF IT......or risk ending up on an episode of HOARDERS.....
I did it in 2017 when I retired and rennovated by apt. But since i am a compulsive shopper, some of the shit I edited out, got replaced.... but now If I buy something new, I get rid of something old, so its somewhat under control.