To me it is super clear that WSL has taken wing chun in a certain direction and was an innovator. He had his own style and fighting philosophy. It is clearly NOT exactly what Yip Man taught, but why is that a bad thing? I just don't see why that is something to be so offended by. I even like the WSL approach.
This whole argument is really taking away from useful constructive discussions. I am really surprised moderators are not picking this up.
Late but wanted to qft this. People have to remember when YM learned WC he learned one of the many lineages that existed. He didn't quibble over Lineage, he simply learned and then taught WC. His teaching of the Lineage didn't match his fellow students and those other Lineages he didn't study also continue.
Today while multiple people say they teach YM Lineage I notice differences there as well even in simply how they perform Siu Lim Tao from how they open the stance to how they perform a Wu Sau (chest or head oriented) during the execution of the form. This is explained easily by the fact that YM taught in the old school Chinese way. 1. he taught to the student's strength, 2. He taught in a short form way that invited the student to question, not just regurgitate what he was told. So when we speak of WC, they all share the same foundation but the details are going to be different depending on the teacher.
Why? There is a central idea in Ch'an Buddhist Philosophy that can be paraphrased as "unless to try to do something beyond what you have already mastered you will never grow." So unless the various people we see as the heads of our respective "schools", regardless of lineage, go beyond what they were taught, blending other concepts, adapting existing concepts to other circumstances etc., they will stagnate and along with that what they teach stagnates.
I'll give you a blunt example from the other art I study, FMA (specifically Inosanto Kali.) First, there is the concept of angles of attack, different Lineages will have them in a different order, the below is just an example of what stagnation can do.
Now if you watch most teachers on YouTube they say "angle 1 is a slash to the upper body, angle 6 a thrust to the head or neck, angle 9 a slash to the lower body." Maybe this is the traditional way but in Inosanto Kali there are no specific targets, they are simply angles of attack that you launch from any position and which strike in direct relation from this to the enemies position, it is not trapping you in a specific move for a specific target.