He's right that open-source vs. commercial is orthogonal to the attributes you should really be assessing. Lumping in MySQL with PostgreSQL just because they're

He's right that open-source vs. commercial is orthogonal to the attributes you should really be assessing. Lumping in MySQL with PostgreSQL just because they're both free is a disservice to PostgreSQL. The author goes out of his way to differentiate Oracle from DB2, but paints all open-source databases as toys. Really, you think I'm not going to notice that there's a significant tier, that most companies probably fall into, between a 50 MB database and a 50 TB database that PostgreSQL can handle beautifully?