since I train some jeet kune do Ive sparred with jeet kune do gloves for the first time, and me and my instructor mixed boxing up with chain punches/straight blast. And I actually found use for it and it looked like nothing shown in those wing chun sparring clips where they try to punch thropugh each others arms at the same time. the trick is to block/cover up your opponents blasts first than retaliate or move sideways at an angle and attack, not try to outpunch them at the same time like in thsoe clips with no movement/footwork. I still havent seen a single clip on the internet of good chain pucnhing in a sparring match.