Not so long ago, having a personal watercraft (let alone two!) on a yacht was considered extravagant. Today, he who has the most toys wins. Why? For one thing, there is a trend toward “doing things” as relaxation, and that translates to more toys. Yachts have also evolved, with more space for stowing this seriously fun stuff in transom garages, on oversize swim platforms and on upper decks with davits for launching them. So jump on in, the water is fine.