I linked the original tweet, the link you provided is nothing new :S
You stated
Microsoft has not announced how they plan to place Windows 10 on every Lumia running Windows Phone 8. It is known that Microsoft is investing minimal efforts in maintaining Lumias on the S4 platform. Microsoft developers did not even feel it was worth it to rewrite Lumia Camera for the 1020. Optimizing Windows 10 for an older, different platform takes much more offer effort than rewriting a camera app. Hell, Lumia 925 did not even get a brightness profile.
Is Microsoft trying to clean their hands of the X2Y devices? Is Microsoft trying to put all their X2Y resources into Windows 10 development? Either way, it is clear that the level of support has decreased.
Maybe I am looking too deep into the subject matter, or maybe, just maybe Lumia 925 users are destined to be stuck on a Preview for Developers/similar program...