My main USA takeaway is there is zero chance of a US woman medaling at 5,000 (sorry Shelby/Karissa) or 10,000. The 1500 remains the best chance, but considering how strong the 1500 race was without Tsegay it will be tougher than maybe we thought going in today (ditto the 800 which had really strong performances).
On the men's side, Barega to me vaults to a true contender with a 52.7 type close in a 26:49 race that was full of surges. That is a better finish than one has typically needed to win gold (if you look at Cheptegei/Farah). Kejelcha ran well and looked good too. I think he is back in 2019 form. Edris I imagine is out but Wale looks like he will replace him as a gold-medal contender. The 1500 was solid but I don't think any should be thought of as major medal contenders.
Overall I guess we knew going in that Ethiopia was loaded at 5-10K, but they backed that up and then some with excellent performances.