Forking from the poll https://www.physicsforums.com/showthread.php?t=338150 I would like to collect oppinions for and against SUGRA, and specially motivations. One of them is that it seems to have enough room for the known fermions. This was stressed by my old boss in http://arxiv.org/abs/0808.3667 and perhaps it could be also reflected in the E8 ideas https://www.physicsforums.com/showthread.php?t=196498 https://www.physicsforums.com/showthread.php?t=202439 Let me stress one of the main points in the textbooks, that while the gravitino has the 128 degrees of freedom of a full Rarita Swinger fermion, the graviton has only 44. So we need to add 84 scalars to the theory. It is tempting to think that there ara 84 electrically charged sfermions in the susy Standard Model. But then the sneutrinos (12 of them), the gauginos (24 degrees of freedom) and the 4D gravitino (2 degrees?) should go to the other 44, leaving only 6 for the higgsinos. If on other hand we use 8 degrees of freedom for the two higgsinos of the MSSM, the 4D graviton and gravitino must me left out!