These may or may not make decent desktop computers.  I assume they don’t given the ridiculous requirements for desktop computers.  However, if you’re a student or engineer that needs to build a test lab on the cheap, you’ll be hard pressed to find a better value.  I built a rather sizable kubernetes cluster using these old optiplex computers.  They’re reliable, the CPU(s) are fast enough, the SSDs are reasonably performant (for server applications), and there’s a good bit of RAM.  Best of all, upgrading the drives and ram is dead simple and affordable.The only “complaint” I have is that I wish the vendor would give the option to choose the accessories that ship with the computer.  Some of us don’t need another keyboard, mouse, usb Wi-Fi dongle, etc.  Ot would be better for everyone if they kept the stuff I don’t need and sell it to someone that can use it.