User blog comment:RoznosicielCiast/Least popular champions/@comment-4061583-20130124222714/@comment-5266525-20130125000430

^ The Hex Core is extremely cost-efficient, but is not so slot-efficient. It's great early game but it really does seal off a superioir item later on. That's one of the things Solcrushed is trying to solve with his mini-rework.