I built mine too, for similar reasons: it felt easier to write from scratch, so that my site looked the way I wanted it, than customize some of the existing solutions (Jekyll, Hugo, etc).

Sure it’s not customizable at all: it can only generate my site. And that’s fine. I like it that way.

For example: I sometimes translate poetry, and I have a bunch of code that renders individual poems from plaintext (not Markdown, because newlines and whitespace _are_ significant): https://github.com/nathell/nhp/blob/master/src/nhp/poems.clj