The key difference is that you could finish the newspaper. Imagine how different Instagram would if after ten minutes of scrolling you reached a point where it

The key difference is that you could finish the newspaper. Imagine how different Instagram would if after ten minutes of scrolling you reached a point where it said "That's it. No more photos until tomorrow!" (You may remember that Facebook used to work that way with their chronological feed. As soon as you saw a familiar post, you knew you were done. There's a reason they killed that feature.)