Two prominent Ukrainians won their gold medals exactly 6 years ago. Both are elite pros, Loma is 3-division world champion, while Usyk unified all 4 belts in his division and most likely will move up to HW. Other boxers from that great Ukrainian team aren't as successful. Only Gvozdyk is fighting at world level waiting for his WBC title shot later this year.
And all it takes is one ridiculous controversial robbery or Decision or outcome to derail their careers.