Konstantin Obenland talks about the concept of the Underscores (_s) theme being unversioned, and how theme authors shouldn’t worry too much about updating their themes based off of _s every time _s updates. It’s a dilemma I’ve struggled with myself. I see something new and shiny in _s and I want it for my theme. But back-compatibility is important if you are distributing your themes, and _s doesn’t make that promise. So keep this post in mind for your themes and projects.