I am normally some degree of depressed, but right now I am much, much more depressed than usual. Usually depression doesn't interfere with my productivity. Right now it seems to be.
So I'm doing the best thing I can: I'm re-reading the propagation section of SICP and watching the 1980s lectures about it. I am thinking it is probably possible, and a good idea, to build a functional reactive UI system on top of Goblins. But I need to remember how it works.