"“24 decade” was a runner up for the Pulitzer Prize but has only been performed once in its intended form."
That is untrue. Judy only intended to do it for 24 hours once, which Mac did. The piece was always designed to be performed in modular increments, generally of 3 to 6 hours.
As you state, the entire 24 decades have been performed in that way in Australia, Germany, and across the US; 3 decades were performed at the Barbican; another 3 decades will return to NYC in the spring; and it may wind up making its way to Asia before judy is finished. That's a big impact in my book.
National conversation? How many shows would you say have done that in the past decade? I can only think of one.
"Hamilton" is a supernova. It has no comparison. And anything that enters a less vaulted, mainstream conversation moves beyond "cultural hit" into entirely new terrain.
Again, happy to modify the word massive. But this thread seems to exist to minimize and erase St Ann's impact over the past decade. And that's before we even get into their work supporting iconic avant garde companies and institutions.