EXACTLY. Very well said. All this talk of 4 hours and so on are fine when your stomach is full and you have built up a capitalist society that feeds off the poor in a different society.
How scalable is this approach of using ASTs? Can you scale this to a single codebase with 500K+ lines? The article talks about multiple different code bases that together added up to 100K.
Second, does one need to worry about getting this right in dynamically typed languages?