This is work that is 5+ years old. Before casually dismissing work that is long in the making, it's worth taking a moment to evaluate it. There are some amazing talks in the README that Herb has given. I particularly enjoyed his "Thoughts on Metaclasses" talk (https://www.youtube.com/watch?v=6nsyX37nsRs) which starts with a live on-stage user study.
Herb's thoughtfulness and care for tasteful evolution is manifest in the way he describes his work, and it's a shame to see it disparaged so easily.