He does "disclose" in related blog post [1]: "I don’t work for Neo4j anymore, why am I here defending them? Well… that and the fact that I still have a dinghy load of vested shares I have to sell so I can buy a place in the Villages and begin a new life as a golf cart driving day drinker."
This seems like a series of post on benchmarking results from different vendors so if he "disclosed" it once I don't think that there is need for another one.
Author here: I did not write that I was proud of not knowing Python. I just wrote that I don't know Python. The thought of trying to understand 2k lines of it looking to see where Memgraph 'cheated' to make their product look good and the other bad was beyond my current capabilities.
So what you're saying is that he is opinionated about popular languages just like every other developer in the world. You don't think you can trust him to write databases because he doesn't like a language that he would never use to write a database.
Weird. Linus Torvalds also hates one of the most popular languages in the world: C++. He must not know anything about operating systems...