Oh, as for the duration of the project, d.net has estimated it will take about the same time as the previous OGR-27, which was five years.
While the OGR-28 is more complex project, the algorithm has been improved. ...So it should take around 5-6 years to complete with the predicted rate of work being done.

The first two stubspaces are almost complete now, and the project's speed (measured in stubs) will increase as the stubs in stubspace 3 are smaller (in nodes).
Therefore the estimate of completion of OGR-28 around year 2040 is a bit of an overkill at this moment.

-S