There are quite a few badges that require one to master many skills. For example, all of the sun badges, along with Artemis, Atlas, Work Horse, Productive, Hard at Work, Just Getting Started, and Making Progress require a certain number of unique skills to be mastered. However, it is difficult to track the total number of skills mastered without spending a potentially very large amount of time counting up every skill one has completed. For this reason, I believe that it would be preferable to learners to have a learned skill counter on the student dashboard. Of course, in the event that a student prefers not to use the skill counter, there should likely be a way to remove it. I hope that you have a good day and that this is implemented soon.