Silverhand

Might be outside of what you’re looking for, but have you considered online chess? It’s fun to learn, doesn’t need quick reflexes, and the playerbase is never going to die.

Reddit was never going to just shut down overnight, but it’s more or less done for me (barring some sudden change with the API stuff, but even then I’d make an effort to use it less). I’ll keep my account around and might occasionally go to it to look up specific things or visit more niche communities that don’t have much of a presence here or on other alternatives yet, but I’m done with just generally browsing reddit or providing any content for them. I’m enjoying it here and hope the boost in activity allows for continued growth and filling out of communities for more specific topics.