> It definitely is, although a cool thing about busybox is that you can rebuild it with any applets disabled. I'm not sure just how small it can get though.

They do distribute statically linked individual binaries [0]. For just HTTPD and nothing else is about 85kb. But it is a lot more than just a static file server - it comes with CGI support.

[0] https://www.busybox.net/downloads/binaries/1.30.0-i686/