I met Lisi back in the day. It also helped that he was actually not a crack pot. Certainly not in the classical sense. He understood the math at a level typical

I met Lisi back in the day. It also helped that he was actually not a crack pot. Certainly not in the classical sense. He understood the math at a level typical of a theoretical physicist in the field, and he engaged the scientific community about his ideas in a deep proper way. The rebuttals and criticism he drew also showed his work was at least taken somewhat seriously and considered. At the end of the day his theory remained to incomplete. Chirality problems were hand-waved away unconvincingly. It's more a mathematical curiosity than a proper proposal for unification.