Does anyone really spar within the confines of their fighting system? Is the concept of "absorb what is useful" not used by every martial artist to some degree? Even by the so-called traditionalists? I am a student of Tae Kwon Do and I use elements of Muay Thai and Wing Chun when I spar amongst other things as it surprises the hell out of my classmates when I block kicks with my shins or block strikes with the rising elbow blocks of Wing Chun. I guess the question should be whether or not we are all mixed martial artists to some degree?
Respects to all