The Japanese have an old saying about money: "A wise man wears his silk kimono inside, and his cotton kimono outside."
Money means different things to different people, and my view of it has evolved like the OP's. I see it now as more of a vehicle to peace of mind and freedom, rather than enabling me to shop till I drop and drive a fancier car.
Money means that when a bill comes that's large and scary, I don't have to put it out of sight and brood about it. I can write a check and dispense with it.
Money means never waiting for the next shoe to drop. It's peace of mind not worrying about what the bill will look like.
Money means I can take advantage of a compelling low airfare offer. Book it, and get a cheap hotel. It's freedom to pick up and go where I please, not doing it too lavishly because the cheap places to stay are the most interesting after all.
Money means what's broken can be fixed. No more panicking when the rains come, worrying about the leaky roof. Etc.
So to me, money is less about buying stuff, and more about quality of life. I think that you are less owned by your possessions when using it to increase quality of life.