I really wanted this feature, but when I actually used it, I realized that it's not quite as useful as I would have hoped, at least for the use case of just a "small" rust script.

A workflow I often have is to start hacking away at a problem with bash or some other scripting language, but then my command starts getting too long and unwieldy so I copy my command into a file to keep going. But with rust, you don't really do that, so I never progress to copying my command into a file.