Eric M Russell (2/8/2016)
There has been explosion in the number of relational SQL databases developed over the past 20 years. The broad sentiment that RDMS don't scale is due to the unfortunate fact that a glut of these databases were developed by people who simply don't know how to properly develope relational databases or write SQL code in the first place.
I'm working with a few of those systems at the moment, and it's *very* frustrating. I would blame the over-use of dodgy ORMs, but some of these systems have been around for rather longer!
Thomas Rushton
blog: https://thelonedba.wordpress.com