You also need to add into the mix the new bouncy spikes they're all using now. If they are anything remotely close to the Next % (and why wouldn't they be?) then the goal posts for world class times will be shifted massively again. Similarly to how 2:06 and 2:20 (for women) used to be exceptional and are now "also-rans" in the marathon, sub 13:00 and 14:30 will become also-rans for 5k.
Let's wait until the East Africans have had a few cracks with these new spikey springs before getting too carried away.