I guess that it will be one of the most difficult things to say for sure that it is not that painful. Even if there are all the scientific proofs of that , people will still fear it weather it is painful or not. The idea of not existing anymore is frightening, and being aware that people will forget about you sooner or later. It makes us work hard trying to mark our existence in this world for longer time. But is it worth it to make people remember you for a long time!!? The reason I am asking this question is that lasting longer will mean more emotional suffering for others. In addition, you will be unconscious of anything that happens after you are gone.