Don't know nor really care about what others do or not......not relevant to what I do or what I practice for...
just sharing some thoughts and experience
People test and train what they practice....
According to the environment they train for....
if there is collision vs conducting, are they mutually exclusive?
I've found it to be so....due to the mechanics and other things behind it..All CMA is internal
how its expressed, developed, used, are what the distinctions reference....... ..
Has to do with joining and sticking....only speaking of taiji
"colliding" as a way of imparting momentum, would not be
what the training method develops nor how its trained...in other lines of taiji might be different ya never know ...
A matter of training....one that if one doesn't train it "conducting" a force
they might be hard pressed to understand how something is done or the why of reactions when others encounter it...