Did he laugh at you for oculus or instagram?
That said, if I'm not mistaken I think Instagram too is deemed to be something for "old" folks by the current set of teens, tweens, and younger twentysomethings.
Not among my peers. Facebook is seen as a way to communicate with older and tech-challenged relatives. It's in the same category as LinkedIn -- a social network whose content is mostly cringe and that you're only on as a means to an end, not because it's a good product.
I had an account years ago but abandoned it as soon as they started to monetise (same for Twitter).