[xelxebar]

Since you bring up concatenative programming in general, I recently came across https://concatenative.org and think some people here might like it.

[evincarofautumn]

There’s also an IRC channel[1] and I’m the mod of a subreddit[2] for people interested in the paradigm. They both have fairly low/intermittent traffic but there’s a small group of dedicated people, some programming in Factor, several (myself included) working on their own languages.

[1]: irc://freenode.net/#concatenative

[2]: https://www.reddit.com/r/concatenative