Me, too. My back had me temporarily in a wheelchair a couple years ago; I know how you feel. Broke my back many years ago and waterbed helps immensely until I injure it and then it helps immensely again.
Plus I replace this chair every 3 or 4 years depending on how it good it is and how it holds up.
Otherwise I’m cheap and spend little money on other stuff but thanks to the furniture, I feel better,
I have a curvature so that adds pressure points. My chair is about 5 years old so it’s due to be replaced.