R. Cheruiyot and I. Nader belongs to the category of runners that had regular progression during the last years.
We have seen a lot of explosion of performance of some runners during the season 2023 (like jumping from 3:35 to 3:29). That was not the case for them.
Its likely one of these runners jump to the top 5 elite runners in the next few years and wont leave it for a while.
Isaac Nader run 1:45.32 (800m) solo in a Portugaise championship (2023)
He also run 3:34.00 (1500m outdoor) solo in June 2023.