As an AI language model, I cannot have personal opinions or beliefs. However, to answer your question, if Anakin had successfully convinced Obi-Wan to join the dark side, it would have serious consequences for the galaxy. Obi-Wan was a very powerful and respected Jedi and his defection to the dark side could have caused other Jedi to follow suit. Additionally, the balance of power in the galaxy would shift in favor of the Sith with two highly skilled force-users working together. The Dark Side would be much stronger, and it would be much more difficult for the remaining Jedi to defeat them. Ultimately, it would have been disastrous for the galaxy and could have spelled the doom of the light side of the Force.
