I am happy to support a working group which wants to take this on, and do the research in which platform would work, who would be mods, what communities should be consulted to use this / who wants this (e.g. regional groups mostly have their own local solution) etc etc
I might be able to help raise some funding, but that would be part of the work too – figuring out what is needed for this, and how much we do need to pay people?
If anyone on this thread wants to take this on, I suggest you gather 2-3 leads + additional supporters and see who wants to work on it.
My personal short list would be Chatto, Roomy, and Colibri. And maybe also a “bridging” strategy (e.g. does running a “mature” Mattermost instance make sense, and bridge that with an atproto native solution?), but I don’t feel strongly about that and I see that as part of the work of a working group to figure out.