Acquiring expensive stuff is almost never deeply rewarding. There are exceptions of course such as good tools you might need for a hobby you enjoy but used tools are often a bargain or there are makerspaces or community workshops you might explore.
* I mostly stopped caring what others think about me.
Outside of a small handful of family and friends, peoples' opinions sincerely do not matter. I am wasting my already finite time thinking about them. That means I've stopped caring as much about looking good, speaking and acting cleanly, and so on in public. Did I disturb someone's peace of mind? Did I make someone happy? Sorry/you're welcome but I don't and can't care; I don't even know who they are and I have things to do.
Essentially, "gaze upon my field of damns and notice that it is barren".
* I am much more likely to purchase premium services and products now.
My time is finite, I do not wish to spend it on things I don't care about any more than I have to. This means I purchase a Windows license or a Macbook rather than deal with Linux config files; I hire a gardener every now and then to tend to my lawn; I take my car to the dealer/mechanic rather than fixing it myself; and so on.
I am saving my own time by spending my money, time I can then spend on things I truly care about.