After a coalition of European science funding agencies announced their Plan S initiative for open access, a number of researchers wrote an open letter criticizing the move, under the title “Reaction of Researchers to Plan S: Too Far, Too Risky”. To summarize, they fear that Plan S would increase costs, lower quality, and restrict academic freedom. In order to evaluate how seriously these fears should be taken, let me start with a 5-point analysis of the issues, before discussing the open ...