That's not true, you just notice it when it goes poorly. PayPal bought Venmo and it's still doing great with the "younger crowd". The Washington Post seems to be doing well with young people after moving their focus to digital and mobile distribution. For Snapchat specifically, people love DJ Khaled and Arnold Schwarzenegger on there, and they were already plenty established before Snapchat.

This move by NBC is not intrinsically cool or uncool, it just depends how they execute it.