The dude was a badass, 6 time undefeated karate world champion (!!!), created his own variant of karate mixed with korean martial arts, was a good friend with Bruce Lee and that scene in Colloseum - probably the coolest thing I saw as a kid growing up behind iron curtain... not many actors can have such a resume on top of their acting career.

Those who cared would/will know him regardless. But obviously those people would be relatively few and far apart.