Addendum Feb. 21, 2017. It has come to my attention that the video of the talk by Salim Yusuf I linked to above has been taken down. I don’t know why the video was taken down, but I will update this post if/when I find out.
Addendum Feb. 27, 2017. Larry Husten has written a summary of the talk.
Addendum March 4, 2017. Some experts quoted criticizing some of Yusuf’s points.