Seamonkey is still alive?
I saw that on Wikipedia, but thought it was probably old and didn’t pursue it. But, hey, sure enough! This isn’t bad at all—it loads my site (seemingly perfectly) and allows me to straight-up edit the whole thing. I wonder if it would be difficult to merge this into Beaker somehow… (This plainly uses contentEditable—which makes me realize that I’m quite wrong—there are some lingering read-write features latent in Chrome, Firefox and so on.)
I’ll research what Jekyll and Hugo are, I’ve seen them mentioned.
I wouldn’t go too far into either of these. I previously used Jekyll, but it got too slow for me to regenerate all my HTML. Hugo is faster, but configuration is just too difficult. There is nothing yet as simple as Wordpress. I’ve ended up writing my own because Indieweb features had to be mixed in pretty tightly.
I think the most promising things right now are TiddlyWiki and Beaker. I think that, as Beaker continues to develop, we will see something as solid as Wordpress come out. But until then, I’d stay where you are comfortable writing.