21st
The real problem with RDBMS and SQL (NoSQL)
Well maybe not the real, real problem with Realtional Database Management Systems(RDBMS) if you have scalability, performance and such high in your priority list, but in the end:
The real problem with RDBMS and SQL is that they work so well that you end forgetting everything you learnt in the Data Structures Course from the hands of Aho, Hopcroft and Ullman.
Modeling a problem using NoSQL backend requires not only to unlearn SQL and Normal Forms, but to bring back your knowledge of Data Structures and Big O calculus.
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