I think it was edited with an LLM - the voice flits from human to bot but various tells are present. The heterogeneity of sentence structure is the clearest signal.
I also suspect that people who spend too much time reading LLM-produced content and using LLMs end up suffering a kind of brain-rot from the "LLM house style", and start naturally using those idioms in their own writing even if they do it all by hand.
Here’s an older article from the author from 2024: https://boristane.com/blog/learnings-from-starting-building-...