This is an incredibly underutilized idea. It still feels like there's ample room for interoperability in the realm of "I write a short piece of code for someone

This is an incredibly underutilized idea. It still feels like there's ample room for interoperability in the realm of "I write a short piece of code for someone I'm working with, and then they take it and use it for something else" in a way that could be very specific to one project. I'd venture to say that essentially no one thinks like this, but there's no good reason they shouldn't?