Ingle's sources say that the IAAF's technological committee is going to clear the Nike Next% and even go so far to say any shoe should be legal as long as it gives no "motor assistance."
The professor doing the study claims that they are even 2.6% faster than track spikes.
Alex Hutchinson plots the top 100 marathon times for the past decade and concludes that the recent improvements in times in 2016-2018 "aren’t noticeably bigger than the fluctuations in annual performance in previous years." Also, if it was really just the shoes, there should be a bunch of 2:04 guys running 2:01-2:02 like Eliud Kipchoge.
"Good governance is a matter of unemotional decision making that advantages no particular side, rather elevates the general welfare. As such, just like the exploration to uncover a better competitive mousetrap never ends, so must the sport’s governors continue to maintain a competitive balance where the medal or prize money distinctions are to be found in the common human condition, not in their equipment, or pharmacological advantages much less choices."