"It is time to unmask the computing community as a Secret Society for the Creation and Preservation of Artificial Complexity." ~Dijkstra

It's very impressive work, no doubt. And as long as no one asks me to debug anything running on top, I don't have any issues with it.

At least with straight reference counting I know what's going on under the hood, that's worth a lot. Sharing pointers across threads is tricky business, I can't really see what that has to do with anything. And it's quite likely that it will run faster, simply because it's much less complex.