Years ago I did fish for trout using a riffling hitch on Bombers and Muddlers. It was a 'special' situation, though, where large browns would predictably start showing up in certain runs a month or two before spawning in the Fall, and tended to be concentrated around specific structural features in the run as they waited for the spawn. And a riffled fly that covered those fish could elicit some very splashy attacks, and some exciting 'chases' from fish whose dorsals were out of the water. The excitement was even greater, of course, if the commotion occurred while fishing at night!
But my hookup rate on the riffled flies was pretty low. If I missed a fish, then following up with a wet fly would sometimes promptly yield a solid hit and hookup. But the use of riffled flies didn't seem to improve my overall success, and after several years I mostly stopped using them.