2. They have forced other artists to take collaborations in general more seriously.
When rappers used to collaborate together, they actually used to collaborate together! Novel idea, right? But these days, everyone is quick to record a guest verse at their own studio and send it over to whoever asks for it through email. As a result, there are artists with hit records together who've never actually met. Jay and Kanye made a conscious effort to record everything that appears on WTT together. And if two of the biggest rappers on the planet can do it, that means that the rest of these rappers can, too. So we fully expect them to start doing it from now on.