Botlane snowball meta
I've seen a few post about this, but it is so accurate. Recently, league of legend is very simple: whoever win botlane win the game.
Snowballing used to come from the jungle or mid, while bot scale for late... Now snowballing come from bot. The first ADC with 1 or 2 completed item and an advantage in cs will snowball the game and win.
I even had a game where enemy team was 10k gold ahead at 18min in, but we won cause our botlane won. http://matchhistory.oce.leagueoflegends.com/en/#match-details/OC1/181585793/200842675?tab=overview
Everything else than bot is decoration. Even jungle. It's all about the 2v2 matchup bot these days.