In terms of physical things, my Audio Technica ATH-M50x headphones. I have been quite literally wearing them all day, every day for the past three years and got no complaints.
I got the predecessor of these (ATH-M50) in high school and I still use them 15 years later. Have a bit of peeling where the headband touches my head, but working perfectly otherwise.
I’ve used my m50s so much over the last 10 years that I’ve replaced the cups, and worn out the headband. I fixed the headband with a tennis racquet grip
