Khabib would always do a respectable job, but even with the assumed advantage in the ruleset, he ain't having much success against ADCC elite in pure grappling, particularly with the DDS approach that's been trending for a long time. It doesn't matter if Khabib and his crew trained at Renzo's, you just can't learn this crap quickly and without doing it every single day. The modern style used in ADCC now is very complex, Khabib had to use his brain to win a Grapplers Quest event for heaven-sakes. I'm not saying Khabib isn't a natural talent, he's the best overall fighter in the world who uses grappling as his base, but this isn't fighting and the modern submission game has so many entries that unless Khabib dedicated himself non-stop for 2 years, I don't see him winning gold or silver. Of course, if Khabib quit everything to train, maybe...