Wow, no one has mentioned Org mode (https://orgmode.org). I started using Emacs nearly 20 years ago specifically because of Org. I use Org for all my static sites, note taking, to-do lists and calendar. Org has a lightweight markup language that has far more features than Markdown (e.g., plain text spreadsheets!), but the markup isn't visible to the extent that Markdown is in most editors. Emacs with Org files behaves almost like a WYSIWYG editor. For example, links in Org files are clickable and their URLs aren't visible unless a cursor is hovered over them. I'm an obsessive note-taker with more than 6,000 Org files in my personal knowledge base and none of the dozens of other writing apps that I've evaluated comes close to Emacs with Org (given my requirements). But to be fair, I create content on Linux only so support for mobile devices doesn't matter to me.

By the way, it's funny that you mentioned Dreamweaver, dv35z, because I experimented with using Dreamweaver as a writing app in the 90s. I still have hundreds of HTML files that include notes and essays I wrote back then using Dreamweaver. Needless to say, I definitely prefer Emacs with Org!