Have we all forgotten about the Romulans? The Andorians? Or the Trill? Or the Borg?That begs the question, why is it that the Klingons seem to be the only alien race in Star Trek that have changed a lot over time. I don't think any other race has changed as much as the Klingons have. Take for instance the Vulcans. What if the Vulcan look had changed in this series, what would the reaction be?