Totally agree. Re: Zookeeper, Kafka are apparently going towards removing Zookeeper. The goal is to give you a calculator to measure complexity. You can totally

Totally agree. Re: Zookeeper, Kafka are apparently going towards removing Zookeeper. The goal is to give you a calculator to measure complexity. You can totally add it to your calculation. You can certainly overlay cost to the calculator by adding an additional column. Cost should not be just the storage layer cost, it should include HR cost, licensing cost, overhead cost, basically TCO for each system in the data layer. But I think generally by simply listing all your systems, you'll already kind of know how complex or simple your system is.