A script requested by @ckadioglu. Something like it already existed, but I thought I would make my own take on it.
What it does is display 0 lessons when you have too many items in your system already. By default this is set to a total of 100 apprentice items, but you can change it to be whatever you want, and not just dependent on apprentice items.
Below are the available settings for the script. You have the score, whether and how to display it on the dashboard, whether to display how many more lessons you can do before they lock, and what each type of item is worth. By setting these you can adjust the script to lock lessons whenever you feel is right.
If you set the scores to [2, 1, 1, 0.5, 0.143, 0.0714, 0.0333, 0.00833] the score will reflect the daily number of reviews you are expected to have, given your SRS distribution. (see [Userscript] Expected Daily Reviews)
For now the settings don’t update the page dynamically, so you will have to refresh for them to take effect after change.
It is dependent on WKOF, so make sure you have that installed. If you don’t you will be prompted after installing the script.