Last Sunday evening was the 90th Birthday Celebration Concert for Stephen Sondheim - put together and produced by Raul Esparza, and starring a jaw-dropping list of Broadway celebrities and personalities.

Despite the technical glitches - which had Twitter abuzz with some excellent Sondheim-related humor - the evening was beautiful.

The performers had recorded their songs ahead of time from their quarantined homes and still, somehow, the music and performances were just as emotional, raw, delightful, and revealing as they might have been with more theatrical conditions.

Why?

The music, the lyrics, and the marriage of the two.

Stephen Sondheim has to be one of the most polarizing musical theatre writers, having been lauded as the most important to live and also berated for being too high-brow and difficult to perform or understand. And yet, he is known as “the master.” Not a master - and we do have many - but the master.

Why? What is this legacy? Why does Stephen Sondheim endure?