I played with factor for a while in 2009 and loved the language. I hung out in the #concatenative irc channel for a few months with many of the factor devs.

I stopped using it because it was a bit too niche, I realised I’d likely never get to use it in any serious context, and instead I learned a slightly less niche but still niche Clojure.

I don’t regret the switch at all and have learned a lot from Clojure, and used it extensively for over a decade. Lately I’ve moved away from it though. Mostly to typescript, a little rust, and Gleam, which is an absolute joy to use.

I still have a soft spot for Factor and am happy to se wits still worked on. It was one of the most interesting languages I at one point played with.