The advantages of CF or 'cruisers' are three: 1) can flat-foot from a seated position, so easier for novices 2) seat can be very big since a wide seat won't interfere with pedaling. 3) upright position is more comfortable to some people, for instance w/ neck problems.
I would imagine crank forwards being used when speed is not an issue. Riding on MUPs, slow family rides, impromptu rides to store/restaurant/etc... I'm sure you can think of more. This is a step closer to recumbents than 'comfort' bikes.