ive kited consistently for the last 10 years. I mostly wave ride strapless on surfboards as i come from a surfing background. however, there are many days when the waves are really junky or i want to ride the large open bays with the notorious waist to knee high, short period waves, places that are normally unappealing for conventional kite boarding. i have found that this is where the foil board shines. i can ride my 10m (tube kite) in 12kt wind and just go sailing or traveling (best conditions on foil are in the lower 1/3 of the kite's wind range). on foil, i feel like i am defying physics and those nasty short period waves.
In addition to defying otherwise marginal conditions, the upwind ability is absolutely unreal. foil boards can point almost 30 degrees off of windward due to the large mast area and almost 0 drag. This allows one to get to any point with little to no reaching.
There are a few of us that like to do bay crossings on foil to other towns that have beach bars. we'll have some beer and snacks and then head back, gliding over 15 miles of open choppy water. (not too many beers as you need a little more finesse on the foil)

foiling is not always my favorite aspect of kiting but it can really clear your head when you just need to get out on the water.