The wing mast is on the agenda for many people down here but proves a challenge to the designers and sailors. The boats carry so much sail area to overcome hull drag and carry the desired crew weight they need the flexible upper mast tip to bleed open during the gust so that they can hold the power.
So why not taper the wind mast ?
John P does it on his F16's and some of the old T's had tapered Alu masts.
