Just this, and occasionally I talk to my spouse about it.

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Besides this one, the Discord server of a more military-focused Worldbuilding community that spun off a Subreddit a while back, and a couple fiction writing communities which guess kinda count?

Fediverse-wise, this one. Are there any others?

The other ones I’m in are more fandom-topical, so for exmaple a few specific communities on Pokémon worldbuilding. Nothing “generic”.

i post most things to my tumblr page