Of all the post-Standard Model theories in existence, string theory has the best publicists and has (to a degree) sucked up all of the air out of competing theo

Of all the post-Standard Model theories in existence, string theory has the best publicists and has (to a degree) sucked up all of the air out of competing theories, so that the lack of competing theories is less due to string theory being better and more due to being unable to get funding to work on competing theories. As far as I understand it, string theory has yet to provide a working model of quantum gravity despite focused work on it for ~30 years. That's not exactly a ringing endorsement.