I had a hell of a time trying to figure out how to word the title. What I mean is something that changed in your life for the better and you immediately started underappreciating it.
I got laser eye surgery a couple years ago and immediately got used to it and didn’t think about all the minor inconveniences that came with having glasses.
Similarly I bought a curved computer monitor because it seemed neat and after a couple hours it feels so insignificant I stopped really “feeling” anything.
Central heat and air. I’ve been at my new place less than a month and every time I had to go back to the old place to pack and clean, I was surprised at how hot the back rooms were, even with A/C and fans on.