The new module system is already incompatible with pre-2018 edition projects, so I don't know why this argument explains why the current module system doesn't bite the bullet and use the file system hierarchy.
> The new module system is already incompatible with pre-2018 edition projects
Code written for the 2015 edition should generally just work with the 2018 edition module system. That's part of what we worked to ensure, and that's why we didn't mix in changes that might have reduced that compatibility.
