I find group chats to be a pretty excellent solution, though I am less gregarious than average. Occasionally I post something in multiple groups or create a new

I find group chats to be a pretty excellent solution, though I am less gregarious than average. Occasionally I post something in multiple groups or create a new "temporary" group in order to share it with people from different circles; this creates some detritus but not often to the point of being much of a downside. The problem I most often experience with group chats is that not everyone's on the same platform (excepting SMS) but old fashioned social media has that issue too. They also don't scale super well to large clubs or organizations, where I think having topic-oriented posts or threads as the default becomes valuable.