This would appear to be an update of the paper that lots of people have written about. The main discussion is here:
https://news.ycombinator.com/item?id=11719543 (157 comments)
Other submissions, some with a comment or two, here:
https://news.ycombinator.com/item?id=11754074
https://news.ycombinator.com/item?id=11725991
https://news.ycombinator.com/item?id=11723319
https://news.ycombinator.com/item?id=11715677
https://news.ycombinator.com/item?id=11713454