Brooks revisits NSB 20 years after the fact and makes pretty strong arguments that specific intervening technologies have not disproved his original conclusions. I think we could do the same today.
The author of this post conflates better with a 10x improvement from a few anecdotal experiences that are themselves extremely accidental to the act of creating software. He may have a point about the large volume of accidental improvement areas remaining but I think this is because like the JS ecosystem they are growing faster than we solve them.
I think the reality is likely the author is themselves a 10x improvement over their decade-past self.