Getting into the rhythm of an online course

Getting into the rhythm of an online course:

"Many experts say online learning is more challenging than its face-to-face counterpart. But as I settle into the rhythm of my online class, I'm learning that it's not necessarily the course work, but adapting to the different style of learning, that's an obstacle."

Let's assume that all online instructors reading this have been online students. What do you believe about this being a reason for students to fail or drop out?

I think time management is the #1 issue keeping online students from success.