I've seen both INTO THE WOODS and ROSENCRANTZ AND GUILDENSTERN ARE DEAD in three different productions, mostly regional. As I used to work on Broadway, I caught snippets of many shows many times, so I discount those. THE BOOK OF MORMON and ONCE I paid for twice, and SPAMALOT I saw (through various circumstances involving my not paying for tickets) in NY, on tour and in London. Other than that, I rarely ever see the same production multiple times.
Words don't deserve that kind of malarkey. They're innocent, neutral, precise, standing for this, describing that, meaning the other, so if you look after them you can build bridges across incomprehension and chaos. But when they get their corners knocked off, they're no good anymore…I don't think writers are sacred, but words are. They deserve respect. If you get the right ones in the right order, you can nudge the world a little.