I think this is a brilliant illustration of the &quot;wear marks&quot; around a basic service.  At its core, it&#x27;s still 140 chars, but each of these subtle deviations represents a bend in the direction of features valuable to users.<p>Developers and designers can benefit from this by not overspecifying how a technology is to be used until loads of feedback has returned.  Kind of like the old story about the architect who didn&#x27;t fill in the sidewalks until students had worn paths into the campus lawn :)