I don't think the game will be abandoned, but just gotta go with the fact that the developer updates this game very, very slowly and the updates don't really add much content either. This is a really slow burn VN, so don't expect any really raunchy scenes either, since the MC has yet to have sex with any of the characters as it is.
My suggestion is just to bookmark this page and check on it every 6 months or so and see what changes, download the update, spend 10 minutes getting all the new content, then save and wait again.