But I actually DO wish for it to continue, as it does look simply astonding in addition to being outright atypical.
However, if the persons responsible for this MOD DO confirm that it is indeed dead, It would be I think best to preserve the work already made in order perhaps at some point to resurrect it, instead to let it die and be forgotten completely. Let's all take advantage of what has been done.
However, should this MOD be still alive (perhaps) and work still being done on it, then of course, by all means, keep the files. But please do inform the community about future plans or developpments.