these short descriptions I've read don't seem to answer this question for me - how is this different from orgmode + org-babel + HTML/PDF export? See like reinventing the wheel for one language, or am I missing something?
I also noted others using to handle blog publishing tasks like latest post pages and tags and such
I guess in total its a general html publishing framework, and at least partly notable for being built in a lisp, given htnl's usage of basically s-expressions