It took tremendous hustle to be an independent rapper in the 90's.

You either had to pay like $100-200+ an hour to use a professional studio or have all your own studio recording equipment which was hella more expensive in the 90's, buy blank tapes and CDs in bulk like weight, sell your tapes hand to hand or out the back of your trunk or convince mom and pop record stores to carry your music. You can't discount the hustle of independent underground rap because that's what the careers of Master P, No Limit and Cash Money were based on.
Nowadays, you have more rappers than fans because anyone with a laptop and camera can produce their own music, videos and upload them to YouTube and Soundcloud and start getting views and streams. Back in the day, an early 90's No Limit tape literally had to make its way from Richmond, CA all the way to Detroit, Cleveland, Pittsburgh, Kansas City or New Orleans. And independent rappers had little to no professional promotion or consistent major radio play. No album reviews in major magazines to generate hype either.
Even becoming a local rap legend was a feat back in the 90's. So when you see independent rappers from the 90's getting millions of views on old songs on Youtube, especially when their songs haven't been referenced by a recent rapper or new school source, it really means something.
On top of that, independent rappers from the 90's tended to be knee deep in the street life or living in the depths of the hood back when the crime rates in the cities were at an all time high, so they juggled the street life and trying to make music on a unimaginable level. They weren't signed to major record labels getting fat advance checks or getting flown out to Manhattan or Hollywood to record their albums and most didn't enjoy nationwide tours to escape the hood after their albums dropped either. For instance, Totally Insane recorded and released their debut album back when their hometown of East Palo Alto was the murder capital of the country back in 1992.

It meant something to be a struggle rapper in the 90's.