I'd rather watch ONCE a dozen times than an ALW megamusical, and a hundred times rather than a Wildhorn debacle, but to each their own.
To me, the delicacy and fragility of ONCE is a valuable commodity amongst the bombastic Broadway musicals. Same reason I have both Joni Mitchell and Metallica on my iPod... different art for different purposes, but they both fulfill their goals.
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.