> The cushions especially are not that durable and should be considered consumables.

This is because they're mostly synthetic "leather", which doesn't last long. Everyone is probably familiar with how synthetic leather starts to flake off. Icky. If you get some pads made from real leather (usually lamb is the go-to choice) they'll last virtually forever. However since real leather is heaver and less porous, this changes the way they sound very noticably (makes them sound less open). If you use open/half-open headphones anyways, the difference won't be too extreme: just moves the sound closer to closed headphones. On closed headphones leather cups make it feel something is covering/plugging my ears. Uncomfortable. Would not recommend.

Worse than how quickly fabric and synthetic leather degrades is arguably that those cups can hardly be cleaned and even when not that old get icky quickly, with dirt stuck in fabric and fine cracks.