Originally posted by VaporaDark
People buy ie when then are ahead
It's not that, you and the person you replied to are misinterpreting the stats. Guinsoo's on average for Twitch is built at 19 minutes, IE at 25 minutes. Meaning Guinsoo's is typically built as 2nd item, and IE more commonly as 3rd. The later into a build an item is, the higher its winrate will be as you are more likely to get deep into your build while ahead than while behind, so the games when you're behind don't get into 3rd item IE's stats as much as the games where you're ahead do. This is called survivorship bias. It also means that more expensive items also suffer from this, as when you're comparing a 2700 gold item vs a 3400 gold item, the 2700 gold item is more likely to have been completed in losing games than the 3400 one, meaning its winrate will be less inflated.
Every item winrate suffers from survivorship bias to a very certain extent, even first items, but you have to absolutely take it int...
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Two extra notes here:
Sample size matters. A decent rule of thumb is 10k games gives you +/- 1% win rate and anything that doesn't exceed that mold is statistically insignificant.
Also, popularity matters. On average, unpopular builds have inflated win rates because players who are smart enough to look into the shop for their items (as opposed to using rec items or Blitz or whatever) will tend to be better at their champion.
Then there's some further things like the ability for players to troll their builds. What if Hurricane is bad on IE builds but good on Rageblade? That doesn't mean IE is necessarily worse than Rageblade on a 3-item build, just means players haven't been building correctly.
Anyways, overall IE is preforming pretty well. Galeforce is still OP, especially on Yasuo/Yone and now that there's enough data on champion item builds, we can act in a more appropriate manner.