"This process allows [many] continuations captured by your servlet to be serialized. This means they may be stored on the client’s browser or the server’s disk."
pg "In retrospect YC would have taken over my life no matter what. It has pushed out essays too, mostly.
I don't consider Arc to have died, incidentally. You used it to say that, and I'm using it to reply. If I ever retired from YC I'd probably start working on it more actively again." 
The thread was quite revealing. Or perhaps it just said what we all probably already knew.