Yeah idk if it was well QC'd but if you look at the overall structure of the article, its very, very clearly in the style of ChatGPT. General, just enough specific elements to be convincing, an air of roundness that seems like its keeping in mind limitation and being cautious. This seems "better" than most GPT output dumped out practically raw, but without being familiar with the source material, who the fuck knows if its hallucinating or just making shit up.

Addendum: I checked out the web site https://www.population.fyi/

All of its articles are written in the same formula. And they all have the same GPT accent. If I had to guess, the author has a series of structured prompts set up to create the specific sections of the articles. The middles of the articles are a bit free form, but beyond that, its pure cookie cutter. They might have some searches set up on a daily or weekly basis to get specific articles with some and such headlines, then just push them through a process that auto writes the whole thing. A quick editorial QC and the article is out there.