This wasn't implemented in the initial commit because we didn't have a function to flush edge selections to vertices and faces. But using the existing domain interpolations makes that trivial, so it may as well be added now to avoid the arbitrary limitation from the user perspective. See https://devtalk.blender.org/t/node-tools-feedback/31388/5 Pull Request: https://projects.blender.org/blender/blender/pulls/113367