@gosha The only new things I have bought in the past few years are books (a few each year), art materials (once a year typically, mostly paper and/or fabric) and potted plants. I don't feel like I'm missing anything at all.
Maybe you feel it's not a good way to live for you, but it definitely works for me.
I do spend money on non-essential things though: going for coffee with a friend, taking the train to go hiking.