Yessica Haircut said: "I can't comment as to how often this has happened or if this is some kind of new trend in the theatre. But, as with any aspect of a production, it's all about what the director is trying to say, how that adds to their vision, and how it compliments the overall experience.
WithThe Doctor, I feel Robert Icke was trying to convey how isolated and stagnant the doctor's life had become after her big decision at the end of the first act. Since the second act begins at least a day following where the first act ended, the image of her sitting at the table and scrolling on her phone as the lights slowly came up (I spent most of intermission in the lobby area, and by the time I got back to my seat she had temporarily gone backstage) made me imagine that, in the time that had passed, that was pretty much what her days had amounted to.
WithParade, I have to imagine it was Michael Arden wanting to highlight the fact that all eyes are now on Leo. Keeping him onstage, watching him mill about his cell like a caged animal, highlights the image of a trapped andunjustly convicted man. Also, to the point above about "No breaks, no rest" - the night I saw the show, a cast or crew member did at least come onstage to give Ben Platt some water.
It definitely wouldn't work all the time, but if used effectively it can add to the experience."
From a directing standpoint, I can see why the choice would be made. It certainly helps to maintain the immersion and environment throughout the entire evening. I still can't help but feel like it is kind of gimmicky.
I was in a production of "The Last Days of Judas Iscariot", where the actor playing Judas had to stay onstage in his cell during the entire performance, from house open to the final blackout. The poor actor would run offstage during the blackout so he could go to the bathroom before having to run back on for curtain call. I feel like most of the time the audience just went "oh, he's still there" by the time intermission rolled around.