Indeed, and not only are their tests automated, they also rely on production traffic to expose failure cases. Since some problems that are exposed are only appl

Indeed, and not only are their tests automated, they also rely on production traffic to expose failure cases. Since some problems that are exposed are only applicable at scale. They use canary deployments to slowly ramp up traffic to the new version; rolling back if they detect anomalies. Maybe you'll find this video interesting: https://youtu.be/2mevf60qm60 https://youtu.be/2mevf60qm60