* The article's title is "What PostgreSQL has over other open source SQL databases: Part II". It's PostgreSQL focused, and part 2 in an N-part series.

* When a similar feature appears in MySQL, MariaDB, or Firebird, the author makes mention of it, its limitations, and provides a brief comparison of the implementation differences and/or limitations of that feature across databases.

Given that the usual form of these sorts of article series is to have a one-half or one article feature comparison in the reverse direction, and given that the author takes the time to briefly call out details of other DB's implementations of a given feature -rather than just proclaiming that "POSTGRES IS THE BESTEST!!1!"- I look askance at ebbv's claim that the article is making unfair comparisons.