Where did all these sightstone rants come from?

So recently tons of rants from both supports and other roles have been go on about how vital it is to buy a sightstone and that's true. It is vital and I'm not denying that. It just sorta feels like they came out of no where. I just go onto the boards and see 4 sightstone rants saying the exact same thing. Basically trinkets don't cut it and a sightstone is needed. Now, that's cool and all, but 30 threads saying the same thing when one of which is pushed quite far to the top of the hot section (7th thread down at the time of typing this). I'm just wondering why all the concern for sightstone has suddenly appeared where as there seemed to be no one even mentioning this before.
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