We are moving house - for the first time in my life, and many times moving house, I rented a skip and binned all of the "I may need this someday" things and old childrens toys.
Now I did put up a freecycle post on a first come first served basis, but the majority of the stuff is going in the skip as it's uncollected.
We have just 6 boxes of things to move with us- 4 is still kids toys, one is pictures and sentimental items, one is full of vacuum packed clothes. Then just the big furniture and pets. It is very freeing, and feels like a start over - but environmentally, not ideal as it all had a potential new life.
However we do grow our own food, buy everything second hand - clothes, toys, furniture - collect rainwater to use on the garden, compost, recycle endlessly the rest of the time, have the heating on low and wear jumpers indoors, hang dry our clothes instead of using the tumble dryer.
I just needed one move where we didn't have the stress of finding space for outgrown, broken, gifted items that we never got round to using.