Hey, where is our iso maps. I'm really starting to miss them. :)
The short answer is that the software we used to create the maps no longer works and is effectively dead (https://overviewer.org/blog/2023/5/9/the-end/). It will take some effort to rebuild the map creation process around something different and I just don't have the energy to do it at the moment.
Someday I will hear the map calling to me and decide to answer its plea for help, but I can't really say when that day will be. Knowing people are waiting for it does help a little :)