Many nations are capable of producing sub-1:45 800m men.
* Kenya, by personal bests, not Olympic and W.C. medals produces elite 800m men to Marathon consistently.
* U.S. produces 60m, 100m, 110mH, 400m & 400mH athletes consistently at an elite level, occasionally 800m men.
* Even Norway can produce an elite 800m athlete, Poland too.
There are so many men in the world capable of f.a.t. sub-48 400m and there are many nations if they treat 800m as a serious event can produce sub-1:44 800m men. No one is racing sub-1:42 800m anymore. With a couple dozen 1:42.xx & 1:43.xx 800m men in Olympic village, a fast 800m guy will not make final and a 1:44.1 800m guy no one thinks about may medal.