Crowning Music of Awesome: Quite a bit. "Everyday People," "I Want To Take You Higher," "Hot Fun in the Summertime," "Thank You (Falettinme Be Mice Elf Agin)", "Family Affair." Most of Stand! and There's A Riot Goin' On counts as this.
Sampled Up: How many people recognized "Trip to Your Heart" in LL Cool J's "Mama Said Knock You Out?"
Likewise, "Shadrach" by the Beastie Boys is built on a sample from "Loose Booty", from one of the Family Stone's unloved early 70s albums.
Seinfeld Is Unfunny: There simply had never been an interracial/mixed-gender group that had been able to cross over the way they did before them.
Suspiciously Similar Song: "M'Lady", from Life, is this to "Dance to the Music". Of course, they're both by Sly Stone, but there's still very similar.
Tear Jerker: "Thank You (Falettinme Be Mice Elf Agin)" is a kick-ass funk song, but the words are heartbreaking: Sly knows that it's all going to be downhill from here and he sounds so coked-up and fatalistic that he's barely singing his own song, just muttering it.
Doubling down in "Family Affair":
You can't leave 'cause your heart is there But, sure, you can't stay 'cause you been somewhere else You can't cry 'cause you'll look broke down But you're cryin' anyway 'cause you're all broke down, it's a family affair.
Vindicated by History: There's A Riot Goin' On received mixed reviews at the time, for its awesomely downbeat mood; now it's viewed (with Stand!) as their best work, and one of the greatest albums of all time.