it may have opened eyes, but it doesn't seem to have made a great deal of improvement to existing arts who are stuck to the main part stuck in the 1920s or a 100 years earlier.
$ belts for money only works if you have a larger population of people who are will to pay for a belt, the popularity created by Bruce, made that a commercially viable business plan, even if it wasn't his idea or intent, very low quality ma school appeared over night in the uk, in there's many thousands to exploit culpable people who had seen I Bruce film
I think teachers who knew Bruce Lee changed some of their methods.
My teacher taught a punch not used in TKD, that is very effective.
His Ideas on training and using what works from other MA at the time was revolutionary.