Each of these steps lowers the center of gravity. A very stable boat results, which doesn't need lots of crew on the rail or frequent reefs to sail upright. The other part is hull shape. Apart from having fuller, more buoyant bow sections to handle the increased power of the asymmetric spinnakers and to precipitate earlier surfing, a lower center of gravity reduces dependency on the need for wide, fat hulls for added form stability. A proportionally narrower hull, that slides through waves more smoothly, is more comfortable when cruising, and faster.
Less motion means smoother flow of air around sails and less disturbed water flow around the hull.
To do so, they would have to buy new asymmetric spinnakers and modify their deck layout for cockpit operated snuffer controls. The good news is that there's never been a time when you've had a better excuse, or when it's made such great sense, to buy a new boat.