Generally speaking, all I really want from an SSG is to be able to keep my pages in a format that's more readable than raw HTML. A few years ago, that was reStr

Generally speaking, all I really want from an SSG is to be able to keep my pages in a format that's more readable than raw HTML. A few years ago, that was reStructured Text. Since then, it's been Markdown. Shortly after CommonMark came out I converted all of my ReST docs to it, and haven't looked back. Theming, shared blocks, etc. are all handled just fine by using includes. If those are stored in Jinja2 templates or HTML files that use SSIs is pretty irrelevant to me. As long as I can write in Markdown, I'm happy.