From my own experience in trying to set it up, the hardest part for me was setting it up to correctly generate all the static HTML pages and get them to correct

From my own experience in trying to set it up, the hardest part for me was setting it up to correctly generate all the static HTML pages and get them to correctly post to Perl CGI forms for things like comments that would then trigger a regeneration of the static HTML. It always struck me as an extremely fragile setup. Oh, and the theming ecosystem was non-existent compared to Wordpress.