Two words: Brian Dunkleman.
What? Never heard of him?
Perhaps you've heard of his co-star, from the first season of a little show called American Idol. In that first season, way back in 2002, Dunkleman and Seacrest enjoyed equal billing as co-hosts.
The show blew up, of course, becoming the biggest phenomenon in television in its first year, surpassing numbers that any other show had seen in a long, long time.
So Dunkelman left after that first year. Guess he figured that the show's popularity was due in no small part to his exquisite hosting skills. Or that since the show was the hottest thing in the entertainment world, he could parlay that popularity into personal career advancement.
He was wrong. As we know, the show continued to be a juggernaut for over a decade, elevating the careers of those who remained with it throughout that time, and making them all very, very rich. Ryan Seacrest is a household name. Brian Dunkelman could land on your head and you probably wouldn't notice.
All of the primary Hamilton actors are, of course, wonderfully talented. But there are a LOT of wonderfully talented actors on Broadway, and most of them are not starring in billion-dollar shows. The extraordinary success and popularity of Hamilton is due primarily, if not all but exclusively, to the genius of Lin-Manuel Miranda. Yes, Jackson/Soo/Goldsberry and all the rest execute his ideas brilliantly on a nightly basis, but no better than any one of a large number of other Broadway-calibre actors could. If these people left the show now, on the hopes that the popularity of Hamilton would make them the next hot thing on Broadway or Hollywood, they would be making a Dunkelman-esque mistake, conflating the show's resonance with their own. With the exception of Diggs, whose talent, look, and performance really are unique, the other principals -- while all strong, talented actors -- are, in the broader context of Broadway performers, a dime a dozen. If they left now, they'd be leaving a monster hit, and years-long job security, for a real risk, a real chance. It would be a foolish one to take.