I will die on the hill that the Riot data API killed the League community.
Now that you can just check a website to see the best build, all the best counterpicks, most meta champs etc people don't need to actually talk to each other or make content about the game.
Without the data API champ main communities would be way stronger and make their own league related content like memes and guides. Having people talking about the game and posting memes on sites like reddit and twitter get other people interested in the game for the actual gameplay and content gets pushed in video algorithms more.
Places like /lolg/ rarely talk in depth about the game anymore because its basically solved by the API.
The game itself would also be way healther as people wouldn't all run the most meta champs or builds because noone would know what is actually objectively strong.