Exactly. I think The Doctor Falls renders it a bit of a pointless exercise. I, for one, love conversations where we get nitty gritty and say to ourselves "Well, those Cybermen in A Good Man Goes to War... where are they from?" But for the suggested article and for the sake a few months of our lives finding the answer and then one sentence on a Wiki, it's just not worth it haha. Moffat has finally provided us with possibly the most interesting addition to the Cyber-race.