tl/dr What I take from the post: Guy has no fun with underlying technology, rewrites from scratch with more fun framework, does not care about current users, thinks this is offset by future users who can more easily use coffeescript.
... as was the code that zed linked to - https://github.com/gilesbowkett/archaeopteryx/blob/0b08ebdb9...
A litany of bilious libel as useful an indicator as asking Kim Jong Un for opinions on Dick Cheney.