Back when I ran the Shenzhen Gastronomic Society I did most of the alphabet in Bangkok one trip, beginning with Afghan. I'd wager it's better food than London on average, purely based on freshness and tropical inputs. I think if you were to pick the best city on earth for food it would have to have resident international populations, a tropical climate, and at least enclaves of wealth with a relatively free visa policy. Bangkok fits the bill. For variety I much prefer it to Singapore, KL, HK, Jakarta, Taipei, etc. Best for drinks has to be HCMC. Paris and New York are up there too, but you have to be 0.1% to enjoy them exhaustively. I spent 10 years designing food robots mostly because so much damn awesome food is ~unavailable outside its origin. Now raising for GTM/growth: https://infinite-food.com