Where to go after this board shuts down? ... Here's one option ...
TheMovieDB.org (TMDb) has reopened its forums for
all shows, movies, and people in its database.
Here's their Jeremiah page:
https://www.themoviedb.org/tv/184-jeremiah
and here's their board for this show:
https://www.themoviedb.org/tv/184-jeremiah/discuss
(currently empty, waiting for posts)
Recent posts from their other boards can be seen here:
https://www.themoviedb.org/discuss
Support discussions are here:
https://www.themoviedb.org/talk