At Google, there are no branches, so typically development indeed happens under some experiment flag. Binary, configs and experiment flags are on separate deplo

At Google, there are no branches, so typically development indeed happens under some experiment flag. Binary, configs and experiment flags are on separate deployment schedules, and often you need to coordinate your release across different systems (with their own binary, config and experiment flag deployment schedules). This requires you to think about backward & forward compatibility of all your changes.