GMAIL: No More Beta

Gmail which has been beta for more than five years is noq out of beta. Why does it took google so long to get gmail out of beta? Google people wanted every service to be perfect cause google has huge number of users on their business profile and they did not want to loose their users for any other mail service. Google people have claimed that although google is out of beta they will still continue innovations in their services and provide their users with the best of the service.