Snappy quote, but it does not make much sense out of the context. "they've" must be referring to functions/methods, not programming languages. And in prototyp

Snappy quote, but it does not make much sense out of the context. "they've" must be referring to functions/methods, not programming languages. And in prototype-based languages methods aren't as tightly tied to data as in class-based languages, which is what I'm guessing Joe Armstrong criticizes here.