In general, Google has a massive set of awesome tools for everything from deployment to monitoring; and a broad codebase with libraries that can do everything under the sun. However, that means that when you go outside of the Google environment, you’re suddenly stuck a bit out in the cold — the tools that you use inside Google can’t be used outside, so you have to have a completely separate infrastructure (both literal infrastructure, and code infrastructure).
À comparer avec Facebook qui a libéré React et Flux. Et qui s’apprête à publier React Native (cache), GraphQL et Relay. Chacune de ces technologies lui donnant un avantage compétitif non négligeable.