Why Did New School Become So Popular

Do you know why “New School” become so popular in the late 1980s? Hip-hop starts at the 1970s, the beginning of hip-hop is starting by DJ Kool Herc. All of the early artists of hip-hop, deejays or MCs, were named 'Old School'. 'New School' was a given name to separate the different style of hip-hop depends on when does it born and what was added. New school rap came out and became popular because the new technology of drum machine came out, the new generation of musicians, and a new type of image for the hip-hop artist.
Before getting into New School, that's talk about hip-hop and Old School. Hip-hop is created by four primary elements, DJing, MCing, graffiti art, and breaking. (Andrew Leach) As mentioned in the first paragraph, hip-hop starts
The drum machine, Roland TR-808 was made by Ikutaro Kakehashi in 1980 and was used in hip-hop and pop music frequently at first. It was a kind of keyboard with rhythm composer. The invention of TR-808 produce the music bass and drum sounds which also makes the music more complicated. (Tjora, Aksel H., 2009) TR-808 gets both good and bad feedbacks. Some people think that 808 was a tragedy, but according to the article How the Roland TR-808 revolutionized music by Zainab Hasnain, it said that “The 808 became a fixture in hip-hop culture, not only as a tool for producers but as a defining sound of the genre."(Zainab Hasnain, 2017) The Roland TR-808 is important to hip-hop because it creates another type of hip-hop music which is the trap, by putting drum or bass sounds that made the music more complex. And 808 did bring a big hit to hip-hop, but in early 1984 it was stopped producing. Roland TR-808 was used by Run-DMC, Beastie Boys, LL Cool J, Public Enemy, Kanye West……etc.
The second reason that New School Rap become popular is because of a new style of gangsta rap. Gangsta rap is shaped by themes of violence, sexism and misogyny, police brutality, and other long-standing political critiques of urban society. (Prier, Darius D, 2012) The gangsta rap was started by the late 1980s and became popular. The pioneers are Schoolly D and Ice-T. Each theme has a different
Microphone, symbolic as a gun, that destroy rap artists. For example, "phrases such as "murder all sucka' emcee's".(Prier, Darius D, 2012)
Sexism and misogyny are basically symbolic black women either in lyrics or music videos as a subject like trophies for players, not just in hip-hop music. These style of lyrics shows that "black women's bodies as sexually desirable, available, and appropriative, mitigate (if they do not fully erase) the neglect, exploitation, and disfiguration".(Lewis, Nghana, 2006) For example, in the song "Dopeman" by N.W.A. in 1988 written that "U need a nigga with money / so you got a dope man to juice as much as u can" ("The Dopeman").
Police brutality, an attitude that urban youth shows to police officers. Blacks or browns usually get lots of problem with police just because of their skin color. Lots of rap songs show the unfairness and the systemic problem that happens on blacks or browns. For example, "F__k the police"(1989) by N.W.A. This song shows that how the policy justice the urban youth.
The gangsta rap is important in hip-hop history. It is an attitudes expression from the blacks or browns to show how the social justice them, how unfairness about them, and their thoughts or