Bigger space is just an excuse to get MORE stuff no matter what your initial intentions are. What you need is a Don. Don is a good friend of mine who has relieved me of two plus heaping truckloads of excess stuff. Where he puts it all is an unknown to all who know him. He never gets rid of anything. His house isn’t THAT big, but everything that he takes off of friends hands disappears within it. He lives alone which is probably the key. Over the decades he has relieved many of their unneeded (if such a thing exists) stuff.
Getting rid of 70+ years of must-keeps is painful, but thanks to my Don, I have managed to be able to walk, not trip, through my basement office and shop even with the lights off without injuring myself.
BD (before Don) this would have been impossible, and after more than a year, I still haven’t missed any of my precious must-have collection of stuff. Well almost.........