On the contrary, I thought it was actually an interesting history of poker players using software to track hand history (a subject which is very common to his blog), and how the industry/area grew into using Postgres. Its not really meant to be a technical article but rather a history of sorts.
As an aside, does anyone else ever feel the desire to start programming some sort of poker app whenever they read codingthewheel? Seems like it'd be such a fun area for a side-project!