That is not what happened, they did not publish the blog post immediately after the transition, and those changes to the GC did not happen until after the port happened. Some people made assumptions about timeline that were incorrect, and then repeated.
The discussion at the time on Reddit [1] mentions this. The general discussion as well talked about if the improvements, which were big in many cases, would have even improved this particular case. We’ll never truly know.
That said it is important to recognize that Go’s GC has received significant upgrades over the years, and remember that what’s true in the past may not be true today.
1: https://www.reddit.com/r/programming/comments/eyuebc/why_dis...
