Of all the electronic waste we generate, old computers are perhaps the most heartbreaking to discard. I’ve already written about plans to keep my decade-old laptop kicking for another few years using a lightweight OS, but there ought to be desktops out there bound to meet a similar fate. When they slow down or can’t run the latest software, it’s easy to swap out the motherboard and processor for a quick upgrade that’s often cheaper than buying a new laptop with equivalent specs, all thanks to the modularity and standardization of PC hardware.