80% Of What You Learn Goes to Waste

80% of what you learn is never implemented, for reasons I would like to list below:

1. You just wanted a certificate of completion
2. You learned something you are not currently working on
3. You questioned the credibility of the information learned
4. You do not have time to implement
5. You are not motivated for change
6. You couldn’t form a habit to implement
7. You tried more than once but it didn’t work
8. You did not understand the material
9. You found a replacement hack
10. You were forced (peer pressure or industry requirement) to learn

What else?