I haven't heard anything about this in 3+ years; don't assume that the page is super-current. But that's kind of the point of the whole project: to make you think of yourself on a longer timescale. The engineers don't want it to be ready in a couple years; the process mirrors the art that it is producing with lots of planning, careful thought about how to get it all to last, a gradual drilling process for the cavern, etc.
I do still wish that I knew how long it'll be before I can visit it, but I take some comfort in the idea that I'll need to look at the bigger picture and wait patiently.