When Discourse and Flarum first appeared infinite scroll was hailed as killer feature that will bring back the life to the forums, because navigating to next page of content supposedly was the issue that prevented people from discovering all the content. But on large forum "all threads" view will just flood the user with everything (forcing them to category selection) and neither of those two offer a way to bookmark a position on threads list (or even make it easy to just browse threads older than given date) - something that paginated threads list makes easy.
Link to prototype for interested: https://v4.misago-project.org/ Source: https://github.com/rafalp/misago-local-dev