Comment by rmoriz

The key is to calculate right and go for the mainstream hardware. If you are a hosting company with diversified use cases, you have plenty of room to downcycle hardware until it breaks. If you are operating under limited space in a field with bleeding edge/performance targets, doing this is not viable. There are many solution provides that will buy your outdated things. I‘m not saying that old hardware is great or a cash cow in general, but the lifetime can usually be doubled or tripled if the right use case can be found and when you are the owner.

Side quest: Virtualized instances at cloud providers never get upgraded unless recreated. I bet there are millions of VMs running for years on specs and prices of 2018-2020.