I thought I saw a report from someone at Google saying that they were still running 7+ year old hardware because of demand. Even if it is not state of the art, if it generates more than the electricity costs, keep it running until it dies.

Hetzner is still running and selling Haswell Xeons and GTX-1080s that are 10+ years old.

Definitely not silicon waste the second something faster arrives. There's still a world beyond cutting edge LLM slop after all.