I'm also making my blog in plain html/css/js with the goal of making it as minimal as possible - in fact the JS wouldn't exist if it wasn't for the fact that it includes some running code examples about demoscene stuff.
Except for my procrastination, it's a real pleasure to write this way, no frameworks, no libraries, no build systems with 10k dependencies, no preprocessors for content - just write plain HTML and be done with it, it's always forward compatible, you always have all HTML features and don't have to worry about some preprocessors capability... If I ever have a genuine need for some kind of build process, it will be a self contained script, I'm fed up with the fatigue of the churn of the web tooling world - i'll stuck to a script that will still run in 10 years.
I did make one choice to alleviate the tediousness of writing tags: 'white-space: pre-wrap', which allows you to avoid html tags for basic stuff like paragraphs. Also using fixed width font and ch units since it's mostly a coding blog so this fits well and allows ascii diagrams without extra work... authoring feels like mostly writing an old skool text file with some nice HTML/CSS upgrades.