DMCA isn't intrinsically copyright. It's a questionable attempt at a safe harbor provision that has horrible provisions for abuse. I'm not even of the opinion that copyright about computer software is poorly executed. It's mostly software patents that don't make any sense to me. When you have a concept that essentially every mathematics undergrad is familiar with getting labels slapped on it & called a novel technique. It's made worse by the fact that the patent office itself isn't enabled to perform any real review. There are no shortage of impossible devices patented each year in the category of things perpetual motion.