He's a former Spotify employee now, but he was a Spotify employee when he made it. I think it hasn't been updated since he lost his data access.
I have a lot of respect for Glenn McDonald for spam fighting all these years on Spotify, but we can go better than PCA for mapping music these days. Any neural embedding model is going to produce more meaningful axes. In fact Spotify had an intern who did just that, just before the launch of Discover Weekly: Sander Dieleman. Along with Aäron van den Oord he was snapped up by Deepmind after their Spotify internship. Those two guys were (and are) wildly good at what they do.
I think this is too much credit given for emotional labor. NY has an intrusive din and these people live in their cars all day. They evolve toward chronic irritation alleviated with impotent shows of force.
Had a hard time parsing this, assumed "breeder" was the role of a human ranch hand, and you were telling them about family trivialities ("bull") so they felt included and soothed. Theory really fell apart around the time you started giving them corn and "sweet feed".
The eternal red flag of a DB UI that tries to support wildly different backends explains a lot of the problems. Many sane and powerful Postgres features can't be used because Directus also needs to support SQLite, for example. Views not properly supported, search features inadequate, graphql DSL with arbitrary limitations, a lot of weird or dysfunctional relational patterns when something much simpler would do... it's a parallel, inferior system on top of stock pg that is very frustrating when used at some depth.