WD have in the past continued firmware releases for old products - for a time.
Indeed the last firmware for the WD Live Streaming (August 2014) was essentially that of one released for its replacement the WD TV (less Netflix) done only a few weeks earlier. I suspect the two boxes are identical inside as we gained a shed load on free enhancements - unfortunately along with those annoying bugs we are all suffering from.
So, I still feel positive we can get bug fixes from them as rebuilds should be trivial and they can use the new box as a test bed for the old box… probably. But it has been a while, and the longer this goes on for the less likely we will ever get a new build. WD have not stated one way or the other… yet!
So live in hope, and reboot 5 times a day, minimum!