There are a set of RDBMS use cases that do care about CAP and consistency - specifically applications that need Active-Active or Multi-Master capabilities. Thes

There are a set of RDBMS use cases that do care about CAP and consistency - specifically applications that need Active-Active or Multi-Master capabilities. These use cases need scale across multiple data centers and low latency transactions. But CockroachDB suffers from worse latency limitations than Spanner since it relies on NTP/hybrid clock to serialize transactions. Disclosure - I work for NuoDB.