Hmm, I'm not quite sure how to interpret Jonathan Blow's tweet. You seem to be saying that he is saying that the Mighty project itself is embarrassing, while I took it to mean the fact that today's beefy computers, with all their CPU and RAM, struggle to render web pages to the point that someone is considering doing a rube-goldberg-esque solution of rendering on a mainframe-equivalent and then streaming you the results is the part that's embarrassing.
Yes, and from that perspective the fact that it didn't work and nobody actually wanted it seems to indicate that it shouldn't have been embarrassing after all.