I thought it was obvious. Clearly it was not. Ray Kurzweil is a futurist who has spent multiple decades researching this topic and has written multiple books on it. His bio speaks for itself.

https://en.wikipedia.org/wiki/Ray_Kurzweil

I guess I interpreted tech-historian's post a little differently than you.

Likewise, I don't support dismissing Kelly's article out-of-hand, based on Kurzweil's position. But I do think it's fair to raise the issue in terms of "why should one take Kevin Kelly seriously on this?"