> Last commit was from march... why was this posted now and is there any interest/activity left?

I work in an adjacent research group at UNC, and I can assure you that this is a very active project. Unfortunately, because most venues now use double-blind review, the updated code can't be posted until after the associated paper(s) are accepted.

I'd encourage any potentially interested parties to star/watch the GitHub repo to keep an eye on development. I've seen some very impressive benchmark improvements from work currently in the pipeline.