Part of the productivity "gain" is increasing agility, making it easier/faster to scale/pivot if you need to. Whether you actually do or not is up to you, and y

Part of the productivity "gain" is increasing agility, making it easier/faster to scale/pivot if you need to. Whether you actually do or not is up to you, and you pay a time penalty as an overhead for those abilities when using a framework. It's similar with choosing e.g. Hadoop instead of running entirely locally. You're mitigating the risk that in future your workload might exponentially increase. Yeah, it probably won't but if it does, whoever decided to on that architecture will look like a forward-planning genius. But nothing comes free.