"I would say it's not rap's musical form that is losing popularity "
I don't know much about Rap, but what I do know of it has no musical form, only rythem. I believe it was invented so those with NO musical talent whatsoever could pretend to be in the music business.
I always thought rap went back to the beatnik coffee house where some one would recite bad poetry whist another beatnik played the bongos.
"I don't know much about Rap, but what I do know of it has no musical form, only rythem. I believe it was invented so those with NO musical talent whatsoever could pretend to be in the music business."
Rhythm is form. The no-musical-talent invention was punk, not rap, which is the more musically sophisticated of the two.