This whole thing has been handled quite strangely. Let's compare with angularjs or threejs.

These frameworks have been developped openly from the very beginning and grew based on user's needs.

Here we have a project,that has received 2 million in funding,which is great,yet it's completely opaque,with a closed beta (I signed for it,never got anything but junk mail,no code to test whatsoever).

IMHO it qualifies as vaporware, an tech demo that looks great but with little practical use.