We went through a similar process after moving country (not worth the shipping costs so we simply sold 99% of our stuff) and felt the same.

A year later we now have just as much stuff as we used to, maybe even more. No matter how hard you try, you will always end up accumulating new things, whether it's through gifts or because you need something in particular for a specific occasion (specialty screwdrivers for example).

I think it's healthy to go through all (and I mean all) of your stuff at least once every two years and sell anything you have not used in a year or more.