As far as I'm aware, the official word is still just "Spring 2019", though given that they repeatedly went on about "every 3 months" in that video they did on it way back when (and that they've kept to that thus far), that's a reasonable prediction. And yes, that's how serious I take my reseach. The more interesting bit, of course, is to speculate not on when, but on what. If we had any indication other than previous form (and even that doesn't really set a pattern), obviously. I mean, we can still guess, but it's just that - baseless guessing and wishlisting.