challenging inertia

According to a recent posting of mine on what constitutes an academic librarian, academic librarians fall into rough categories. This previous post makes these categories seem mutually exclusive though this isn’t true. Regardless, these rough categories are useful. They make one wonder what makes individuals slam to a halt and solidly reside in one place versus those individuals that are capable of fully or partially moving with the times and changing definitions of librarianship. What are the differences? Can we and how do we identify those factors and use them to leverage people out of their inertia? hhmmm...