The RDBMS cabal set a particular set of standards (ACID) that were a good match for a lot of the early "big data" systems and the computing infrastructure of th

The RDBMS cabal set a particular set of standards (ACID) that were a good match for a lot of the early "big data" systems and the computing infrastructure of the time, but times change Times change, but in the sense of adding additional systems with new requirements. The existing systems have not gone away, and are not going anywhere. In fact there are more than ever of them around. I certainly still want my bank to run a system that has ACID transactions. Likewise my mobile phone's billing system, utilities bill, etc.