I know they've mentioned it before (and more recently in the AMA video - specific timestamp here here), they said that at this time the developers are unable to work full time on the project and they don't want to go down the road of empty promises for the sake of having specific dates on paper.  I agree with that, as plans are always changing! 

They are great at providing updates when they're available though, and are also approachable on Discord if you've got questions on how things are going.   If you haven't already, I suggest watching the AMA video (linked here) or follow their social media channels and Discord to get updates when they're available!  If anything, the community is great and helpful!