The 1989 Beastie Boys album Paul's Boutique is a love letter- to New York City, to hip hop, and to popular culture. As a follow up to their wildly popular Licensed to Ill, however, it was a dud. The crowd that fell in love with the group's frat-boy antics and heavy metal samples of songs like "Fight for Your Right" just didn't know what to make of it. Perhaps more importantly, Capitol Records didn't know what to make of it and stopped promoting it after a while, and the album was labeled as a "commercial failure".
Time has been kind to Paul's Boutique, however. Critics liked it, and it did eventually sell a million copies. The samples and beats put together by the Dust Brothers hold up well, and the rhyme approach taken by Mike D, MCA and Ad-Rock is much closer to the style they would use for the rest of their careers. Many Beastie fans consider Paul's Boutique their best album, and it routinely ranks highly in "Best Album Ever" lists.
Released not long before Paul's Boutique in 1989, De La Soul's 3 Feet High and Rising shares the same sense of fun as Paul's Boutique, and producer Prince Paul layered it with just as many samples as the Dust Brothers had used. This AV Club article does a great comparison of the two. Paired together, these two albums represent the high-water mark of hip hop in 1989. As they had done with Paul's Boutique, KEXP devoted a day to 3 Feet High and Rising in 2016.
Despite the sample--heavy nature of Paul's Boutique and the rise of sample-related litigation (for example, De La Soul was sued for using a Turtles song on 3 Feet High and Rising), only one lawsuit arose from the album. It was filed in 2012, days before the death of founding Beastie Adam Yauch. The suit was thrown out in 2015.