my guesses on why Yianni is not getting as much attention as might be expected:
As noted, another guy is also going for his 4th and he wrestles for Iowa
In comparison to the other Cornell 4xer, Dake had the novelty of going for 4 in 4 different weight classes which got tons of attention
Dake going for 4th v returning Hodge winner Taylor also was huge. Certain discussion boards were almost fixated on it.
To a much lesser degree but something that might factor in more for future 4 timers...the more times it happens especially with less time in between occurrences, the less 'awe' factor there is.