beeeeeeeeeep
Flew two CO legs today and at both airports, the boarding machine beeps and requires operator intervention when someone is boarding an exit row. It is a huge interruption to the boarding process and with 5656 flights a day, a 5 second delay for a dozen exit row passengers (average) is four man-days wasted every day (one minute per flight).
Side-note, the new warm nuts and hot cookies even on short flights is a nice improvement.