Here in the Maldives we see a lot of people turning to small (140-150cm) wake style boards with straps, there is a few reasons for this;
One is being able to ride wake style and still being able to go high and do one or no footed tricks.
With good shaped straps you get a super nice fit and can hold a hard edge very good BUT still having the possibility to kick the board away when something goes bad. Everyone here uses the shaped DaKine Core Contour strap.
As said earlier the straps also allows a more natural position while riding, easier to turn hips and body.