You are completely and totally right in terms of technology. They target related, but separate and distinct, use cases. One company can quite reasonably and c

You are completely and totally right in terms of technology. They target related, but separate and distinct, use cases. One company can quite reasonably and consistently use both for different purposes, even within the same project. However, many people, even ones that should know better, do not see it that way. A lot of Relational DBAs, especially the ones that just see it as a way to make a living and have no real passion for it, see NoSQL as a threat to their jobs and want it to die. On the flip side, many NoSQL advocates really are championing it as replacements for a relational database for almost all use cases. There should not be a debate, but there really is one going on.