My daughter sold or gave away almost everything she owned, house, car, clothing, furniture, and moved to Germany. Got rid of our guest bedroom bed and dresser, and put her bed and dresser there. Her desk top computer is boxed up in the closet, lots of clothing, the stuffed rabbit she has slept with since birth was left behind.
And we still have a bunch of our son's stuff and he moved out 11 years ago.
Drives my wife nuts, but we have the room to store it. Heck, when my mom passed away, I still have stuff in my old room and I had moved out 31 years earlier.