Track mistakes & failures?

Wouldn't it be cool if lichess tracked how many times you made a certain type of mistake so that you could work on what your worst at? Then maybe training could incorporate puzzles to help you in the areas that you fail in. Thoughts?

very good idea,but, it wouldn't be fair if your opponents knew what mistakes you make, they would probably take advantage of it

Make it private then, opponents shouldn't be able to view this.

It might be easier if tactics puzzles had tags as to the types of them and if you repeatedly failed tactics of a certain type you would at least know to improve them?