I don't think it's a couple of guys. I think the vast majority of male pros hit game-ball cuts (particularly with the ball near the spot) with a touch of outside, around center ball.
Another trend I'd argue for is using a little outside to cinch back-cuts. I recall seeing both Archer and Deuel do that in a Mosconi Cup match (I believe that's where I saw it). Didn't seem to be necessary for position ... in both cases they were fairly close to the object ball, maybe 3 inches, on half-table or longer shots. I've also found myself to be more consistent on such shots since I've taken up that practice.
Another trend I'd argue for is using a little outside to cinch back-cuts. I recall seeing both Archer and Deuel do that in a Mosconi Cup match (I believe that's where I saw it). Didn't seem to be necessary for position ... in both cases they were fairly close to the object ball, maybe 3 inches, on half-table or longer shots. I've also found myself to be more consistent on such shots since I've taken up that practice.