I recently edited a post on the main site, adding links with the Referencer as necessary. However, when I clicked on the link to test it, I found that http://www.yonanewman.org/kizzur/kizzur1.html is no longer available online. I briefly considered linking to an archived version instead, but ultimately chose Sefaria.
The Referencer should be updated, if possible.
If possible, someone (@Hod?) should fix the Referencer so that it can be used effectively in the future. I lack the technical ability to do so. I don't think we should use the Internet Archive; I think Sefaria's Kitzur looks much nicer.
Historical posts should be updated.
We should consider making an effort to fix posts that have used the Referencer links to the KSA, so they no longer point to dead pages (à la the ongoing image project). I don't know how to make a query to find all of the yonanewman.org links, but the KSA is referenced in over 400 posts, so there could be very many posts that need fixing.