Why we need the NBN

How much internet did you use 5 years ago - when Facebook had just 100 million worldwide users (it now has around 1.1 billion)? And before the existence of:
-Instagram
-WhatsApp and
-Google Docs

How much internet did you use 10 years ago - before the existence of:
-Facebook
-YouTube
-Spotify
-Twitter
-Reddit
-Dropbox
-Tumblr
-Khan Academy
and when Skype was just starting up.
Before Smartphones and Tablet devices were invented?