The "Mark Incomplete button" seems to have been replaced with the NOTES and BOOKMARKS buttons that are now available after the update. HOWEVER, i still feel that the "Mark Incomplete" button has a different utility than the "Notes / Bookmarks" buttons

1)

To illustrate this difference, For example, I hit an A-Ha moment in the lesson and “hey that is something I can use at work related project” so I can bookmark it / put notes in there and come back a few months later to revisit and then implement the “A-Ha” moment realization at work related project

The bookmarks and notes are there, if & when, down the road, we need to access them.

However, they do not interfere with the lesson progress.

2)

On the other hand, The MARK INCOMPLETE button , when used for lessons, that I am still unclear / struggling with / have not fully grasped the concept in the lesson, WORKS AS A BUILT-IN reminder at the end of the lesson / before final assessment, that I must revisit and complete those lessons where I WAS ON shaky ground / unclear on the core concepts

There is a difference between the utility of the 1) Bookmark/Note versus 2) Mark Incomplete buttons – and I say that from a student's perspective