Too Long; Didn't Read
I’ve linked to articles about web components and shadow <a href="https://hackernoon.com/tagged/dom" target="_blank">DOM</a> before but I cannot help myself. It is awesome! For most teams it might not be something you can use today. It is still a fairly new spec and not supported in Firefox and Edge. Although, both browser vendors have publicly said they will support it in a near future. Anyway, this article from Monica, who is a member of the Polymer team, is a great article about shadow DOM and the benefits it gives.