This project was picked up (and forked) by Rosatom for its internal Jira replacement after they got cut off from Jira in spring of 2022. No idea how many changes they introduced, but I guess OpenProject should be powerful enough (or at least provide a powerful enough base to build upon) to handle giant projects at their scale. The fork is not publicly accessible, although they do conform to the GPL and provide the source code to their clients.