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How many times have we buffed damage as opposed to durability
The problem with this is that they don't question "how significantly have we buffed damage in any given instance versus durability, and how often?"
Nerfs are most often flat nerfs, or nerfs to base stats as opposed to scaling now, while buffs VERY often include buffs to scaling, especially in terms of CDs. Riot has given many significant scaling buffs over the years when champs aren't popular but aren't weak, and the overall impact typically goes unseen even when they become popular as most games don't reach 4-5 items.
Mid-late game fights are extremely obnoxious now as a result of this. This is why games are often nuclear arms races. Champs just scale too fast in general now combined with the global gold increases, power creep among items, and runes over the 13+ years league has been out.