I’m supposedly strongly in the unmaterialistic camp, but to my horror often when I finally buy useless nice to have things they turn out to be really important

I’m supposedly strongly in the unmaterialistic camp, but to my horror often when I finally buy useless nice to have things they turn out to be really important sources of active happiness for me for years. Like buying a nice car after owning reasonable cars previously, building home cinema or getting guitar way too good for my skill level when I already had a guitar.