The servers are still up; presumably so they can keep selling their existing stock for the conceivable future. But the full promise of functionality for Vector will never arrive.
Also, from my experience, Anki was really good with the security behind Vector. He's so locked down that they'd have to officially release a firmware just to provide the functionality to load alternative firmwares or access other services. And with SSL you can't MTTM any of his connections.
I just don't see them having the resources to do anything more useful at this point.
On another note, not sure why some people are complaining about the price. I own a Cozmo and Vector, both seemed fairly priced to me.
https://github.com/anki/drive-sdk https://github.com/jacopotagliabue/anki-drive-python-sdk