At Meta, a chaotic culture and lack of vision have led to brain drain, with rivals saying its AI talent is lackluster. But Zuckerberg’s frenzied hiring spree hasn’t stopped the departures. Meta was teeming with top AI talent, until it wasn’t. Years before Mark Zuckerberg’s high-profile shopping spree, the company employed the researchers and engineers that would ultimately depart to start major AI companies: founders of Perplexity, Mistral, Fireworks AI and World Labs all hailed from the Faceboo...