It is called designed obsolescence. There is a tipping point for every product where the bean counters cut it off. Research light bulbs. Car makers for example have a cut off point where a flaw can cause so many deaths before they do a recall because of the costs of doing so.I actually think it's more insidious than that. I wouldn't put it past companies like Intel and AMD to intentionally design it that way so they have an out when it comes to RMAs. "Oops, you pulled out the pins of the CPU when taking it out to RMA it. Sorry, you're fucked. Thanks for the money, btw."
They are that evil when designing shit and making decisions.