From the people I've talked to, Epic Games and Riot developers seem to have their shit together as far as being able to scale their backends to millions of play

From the people I've talked to, Epic Games and Riot developers seem to have their shit together as far as being able to scale their backends to millions of players. Improbable too (although they're more of a game services studio), who are the creators of Thanos* * https://www.improbable.io/blog/thanos-prometheus-at-scale https://www.improbable.io/blog/thanos-prometheus-at-scale)