Unofficial extensions are still being updated. I’ve got working bato and everything. Haven’t run into issues so far. I’m not sure how this korean company got to them or why, since they’re not even hosting the content. But either way, things should be good for now.

Tachiyomi is too good to fail. It’s the best manga reader that has ever existed. It’s open source. If they need to offload extension support onto less organized entities, then so be it. The community isn’t going to disappear.