A lot of hip hop still has unlicensed samples in it but the slices just keep getting smaller and less recognizable. And believe it or not a lot of the samples in Paul’s Boutique were licensed. I do agree with you though that (maybe until recently as I think the price of sampling is softening somewhat with sites like tracklib) Paul’s Boutique would be expensive to release today. Then there are stories like the Mark Ronson song ooh wee that he owns -25% of[0] because the boney m string riff took 100% of the publishing and Dennis Coffey drums took another 25%. So he theoretically lost money each play. Public enemy’s it takes a nation of millions to hold us back is another album that would lose money to make today.

[0] https://en.m.wikipedia.org/wiki/Ooh_Wee_(song)