Ricans came into HipHop and latched on to bboying right when it was considered played out by the pioneers
Trac2 started bboying in 1977
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Here goes an interview from 1994 when Trac2 describes the demographics of bboying/hiphop as he saw it 1977
Black people had been bboying since 1970 and left it behind as they became older/mcs/djs etc...
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this is how the demographics shift from the 1970s to early 1980s made it look like Ricans created bboying by the time HipHop started being filmed (Wildstyle, Beat Street, Style Wars etc..)