My static site generator is 5500 lines of Java, because the only thing I hate more than software I didn't invent myself is technologies that are fashionable ;-)
To be fair, 10 years is still uncomfortably modern in my book. My tech needs to at least be old enough to drive a car. Ideally it should be old enough to have an existential crisis about how its life is turning out.
... and you can probably build a 100 LOC static page generator in Java as well.
My thing does a lot of weird crap, though. Like it also acts as a Gemini protocol server, you can publish from the web and it pushes every change to a git repo. It also tracks backlinks and re-publishes every page that is mentioned. It also renders from a specialized version of gemtext so there really isn't any standard libraries to use (that I'm aware of).