[moocow01]

Everything is replaceable or at least thats how the saying goes. I think the point being made is that if Facebook/social media disappeared that it would barely make a dent in how we live compared to if Amazon/e-commerce or Google/search disappeared. At least thats how I interpret it.

[jamesaguilar]

That's probably true, as indicated by the order they arrived on the scene. Social media is at a more rarified level of need. But to jump from there to saying nobody would care? I could say that computers are useless compared to, I dunno, the wheel, therefore no one would care if computers went away. Would you say that rhetoric is useful? Personally, I think not.