This is nice and all, but there's no valid justification for any of the material in the digital library to be locked behind a paywall in the first place. Most of the research published by ACM was paid for by taxpayers, and authors have to either sign over copyright or grant exclusive publishing rights. To be fair, ACM's fees are far more reasonable than the big publishing companies, and there are open access options available (at a cost to authors).

They opened the whole thing up for unlimited access for a brief period during the pandemic, but decided to walk that back after just three months. If you know where to look, there's a 500gb torrent floating round with the 480k+ papers that were accessible as of June 2020.

It's sad that in this day and age, particularly with the widespread acceptance of open source, most academic publications are still behind a paywall. We shouldn't even be having discussions about "open access"; the "open" part should just be implicit.