I think RENT was the first show I ever saw where most of the cast was miked with headsets. Since then I’ve seen it in many professional and amateur musicals. Sometimes it bothers me, especially when it’s a musical like CABARET or RAGTIME that are set long before such technology existed, but I suppose it’s worth it for the superior sound quality. On the other hand, you’re already pretending that a universe exists where people burst into song and that the obviously painted backdrop is a house, so just go with it.
OTOH, I’ve known a couple of people who say it takes them out of the show, especially when it’s not a musical. It was done in at least one Shakespearean play I saw (King Lear) which bothered me more than it does in musicals.
Anyway, just curious if others are bothered by it or not.