I don't know what DHH meant, but the idiom "in anger" is used to mean "in seriousness", "for real" or "properly". Whether or not DHH meant the idiom, I do not k

I don't know what DHH meant, but the idiom "in anger" is used to mean "in seriousness", "for real" or "properly". Whether or not DHH meant the idiom, I do not know. But its likely. For example: "I've been tinkering with emacs, but I've yet to use it in anger."