Git likely won because of GitHub; I abandoned Mercurial quite early when it was clear that it had lost. It was good, but I cannot imagine using it today.
"We are reorganizing for the agentic AI era" reads better than "our gross margin is compressing, our SBC is too high, and our growth is decelerating." Both descriptions could be true; only one gets you a flattering blog post.
I think the author's point is that each type of job will basically disappear roughly at once, shortly after AI crosses the bar of "good enough" in that particular field.
The superpower of go is goroutines and channels. The kryptonite of go is its limited libraries. Go is a great choice for many concurrent applications. I couldn’t finish reading the article because it lacked focus.