Key advantages of in-boom furling compared to in-mast are a more efficient mainsail shape, and less weight aloft in shitty conditions when reefed.
Boats are a series of trade-offs.
Three spots, really, when you add in the winch. The mainsheet winch on Isobel (about 75’ “modern classic”) apparently pulled out of the deck last year. Dismasted and written off earlier this year.
Not sure how similar it was to this arrangement, but it is not unusual on big modern boats. Much...