Do you have examples of popular games with surprisingly underwhelming SR communities that had integrated speedrunning tools? Do you know any lesser known games that used tools like these to their advantage to cultivate a hefty SR community?

I'm referring to tools like, leaderboards, recordings/playback and ghosts.

My fear is that speedrunners are less likely to ever talk to each other if the game shares your scores and runs automatically, and forcing them to use external tools is more likely to create a community that engages them socially. This comes from a GDC talk by (I think) Jake Birkett, who noticed that his games had worse virality if he included a networked high score leaderboard.