One of my commenters reports that he showed my essay on evaluating the harm from closed-source software to Richard Stallman, who became upset by it. It shouldn’t be news to RMS or anyone else that I think he’s a fanatic and this is a problem, but it seems that every few years I have to explain the problem again. I make the effort not because of personal animus but because fanaticism does not serve us well – we’ve made huge progress since 1998 by not repeating RMS’s mistakes, and I think it’s important that we continue not to replicate them.