Interesting article. Thanks.

Noticed a lot of use of setq... Wondering if this is simply the author's muscle memory or if there is a speed or reduced complexity advantage compared to using setf.

I think this kind of demonstrates the amazing plasticity of Lispy environments. There are multiple ways of doing something as relatively straightforward as assignment, all within the one version of the environment (I know, other langs can do this too, but still neat).

I'm gradually getting my head around Emacs lisp. Lots of setq there.