Likely someone has to bring the positive reception wikis back to FANDOM since the source code of the wikis have been released by a admin.
The negative ones however may need to be put on a different site like a wiki site that uses the same code as MediaWiki.
Considering there are still some users who want to use the wikis longer, we shouldn't give up with the wikis altogether. We should give the wikis ownership to other users who want to maintain the wikis, considering that we are almost there to the wikis 10th anniversary in 2023. We can keep the wikis alive for a bit longer and at least celebrate the years the wikis stayed up before shutting them down.