I mentioned elsewhere in this thread that I built a jigsaw puzzle website [1] with a Rust API backend and I launched it last week. It definitely took longer than if I had used Node, but I enjoy working with Rust much more.
Apart from that website, I have also open sourced a Rust CLI task runner [2] which uses markdown files as a command definition format. This is probably the most important tool I've ever written, as I have used it every single day since.