One review for that headband cover I linked above was basically stating "with the cost of this and new earcups, you're already up $50 from the original price of the headphones, may as well save some more and buy a new set".
I disagree with this in my specific situation. I've used these headphones for a good 5-6 years already, and don't want to get rid of them simply because they are the best in their price range, and the fact that the chassis itself is incredibly well built. The earcups and headband suffer from using faux-leather, the kind that flakes off, same as cheap office chairs. The extra parts were a bit expensive but I'd much rather spend a few dollars here and there to extend it's life than buy a brand new set each time my old one breaks. Sound quality is still as great as ever.
The earcups I have are cooling-gel cushioned, so the feel is a bit stiffer but still very comfortable. I like how they are a bit stiff against my head rather than the cotton-like cushion of the original earcups that sort of molded to your head with how soft they are.
The headband cover is a soft-touch silicone, which is not my ideal material of choice, but would be leagues better than the faux leather. There were only a couple other choices for headband covers, this seemed to be the best. One complaint is that the zipper rattles around, a small bit of electric tape will fix that.
It's not unheard of for audiophiles to keep headphones in great working condition for 10+ years, though I wonder how far my milage will go with these gaming headphones. 5-6 years in, no signs of slowing down besides wear and tear.