A mixed review for Plan S’s drive to make papers open access | Science | AAAS

"Plan S, the effort by European funders to increase the share of journal articles that can be read without a subscription, has had an unintended outcome, a report released today says. It has spurred progress toward open access, but most of the growth has occurred in so-called hybrid journals that also publish other articles behind paywalls, despite hopes that Plan S would help tear down those walls..."