Not to diminish the incredible athletes we have competing today, but I think he's wrong. Here are the distance WRs set in the last 3 years (at least one in every main event but W 10k).
2018: M Half 58:18 (Abraham Kiptum), previous record 2010
2018: M Marathon 2:01:39 (Eliud Kipchoge), previous record 2014
2019 M Half 58:01 (Geoffrey Kamworor)
2019: W Marathon 2:14:04 (Brigid Kosgei), previous record 2003
2020: W 5000m 14:06.62 (Letesenbet Gidey), previous record 2008
2020: M 5000m 12:35.36 (Joshua Cheptegei), previous record 2003
2020: M 10000m 26:11.00 (Joshua Cheptegei), previous record 2005
2020: W Half 1:04:31 (Ababel Yeshaneh), previous record 2017
2020: M Half 57:32 (Kibiwott Kandie)
2021: W Half 1:04:04 (Ruth Chepngetich)
It's clear to me and many others that the spring shoes have a big impact on runners' performance. I think after Tokyo, the running world will face three choices for the kind of sport we want to have.
1. "Innovation" where shoes matter as much as runners and medals are awarded to the entire engineering team as well as the athlete. Eventually everyone races on Pistorius pogo-stick blades.
2. "Regulation" where we allow spring shoes but create increasingly complex and byzantine rules to keep the playing field roughly equal yet advance over time at a rate that doesn't make people too uncomfortable.
3. "Banning" where we simply decide not to allow spring shoes.
My problem with arguments for the spring shoes is they have no philosophical backbone. It's all hemming and hawwing and not-too-muching. I think that racing shoes should not be designed to store the energy of landing and return it on toe-off. Period. I'm sure people will tell me this is impossible to regulate and even normal shoes do it, but that's my philosophical starting point for what I think the sport of running should be about. Curious if spring shoe supporters can offer a different one.
Anyway, I'm sure that we will be railroaded into the "Regulation" world (we already have been) because that's how Nike makes the most money.