The ACM is paywalled for the majority of the publications it manage. I found the ACM paywall to be one of the obstacle that limit access of the new wave of the

The ACM is paywalled for the majority of the publications it manage. I found the ACM paywall to be one of the obstacle that limit access of the new wave of the code educators to older results in teaching programming: they are not in the academic sector and lack both knowledge of and access to this enormous amount of papers. So, in this case, the paywall keep a new generation naive, as they reinvent independently research that have been conducted decades earlier.