Note, in the past 30 years the Wing Chun experience and knowledge around the world has increased dramatically. In my day there was not so much experience of Wing Chun against Western fighting arts but now there is a lot. However the old traditional knowledge is still necessary to learn first but then what has been learned over the past 30 years about fighting has to be taken into account. Even MMA and western boxing cannot keep with ideas from even ten years ago. Each generation should be better than the past.