You can identify good conversationalists
Here’s another interesting outcome of interrupting less: you identify good (and bad) listeners. You see what happens if you allow someone to just speak, as long as they want, without interruption. You might find that some people never give you the chance to talk. They just monologue at you. If you’ve always interrupted them, you might not have realized how self-involved they were. When we aren’t good listeners ourselves we don’t realize when we’re dealing with other bad listeners.