Both of us were early users of the del.icio.us service, having used it during our college days and beyond to make sense of our web pathways.
Around 2016, the then owner of the del.icio.us domain started injecting ads in the feeds of the long gone users of the service. This triggered a discussion with Julien Deswaef about reviving the old Delicious look on top of Shaarli, a free/open source web platform focused on publishing bookmarks.
From there, we worked with Julien to develop a theme for Shaarli based on the early 2004 del.icio.us layout -- thankfully preserved in screenshots by its author, Joshua Schachter.