User blog comment:ZeloAvarosa/The games are getting too long/@comment-4309841-20150907154507/@comment-26044269-20150909063354

By the time everyone is full build the better team comp wins, as the very fact that everyone got to full build implies that neither team are better than the other, or at least by a considerable amount.

Save for teamfight cock ups and stupid decisions, the team with more aoe just wins. It's hard to win when end game comes with just skill alone.