One of the core developers actively blogs[1] about Factor. His articles are all written for audiences intent on learning the language. Many of the posts are inspired by small snippets of code written in other languages that are then written in idiomatic Factor.

[1] http://re-factor.blogspot.com/

I have only dabbled slightly with Factor, far from enough to have an informed opinion of it. But I must commend the FFI, http://docs.factorcode.org/content/article-alien.html, it's impressive in how concise and friction-free it is to define C types and to use them. It definitely has a place in my FFI Hall of Fame.

According to his Google plus profile, Slava pestov is now at apple. https://plus.google.com/+SlavaPestov/about Factor replaced lisp for me as my language on a pedestal. Still autohotkey + c++ for getting stuff done on windows...

I miss the old HN- factor made an appearance every week.

Now we have Rust and Go for that. Unlike you, I won't miss them when they're gone.

The factor discussions never had the frantic fear mongering that seems to accompany rust & go

I played with Factor a few years ago and came away impressed. Sounds like the library has only gotten better.