Like now it's possible to go days in some cities without seeing a single obese person. It's still a big problem. Outside of the cities and in lower class areas, but... I think the changes are trickling down / propagating? That's been my impression at least.
Surprised by your take on fast food, by the way. When I complain about fast food like was ubiquitous in the 90s I think of McDonald's and other highly processed things. The type that are covered in salt and cheap oil and artifical smells and where the meat is like reconstituted garbage, where lunch is 1500 calories, where everyone gets a giant soda, where kids are enticed with cheap plastic crap.
But a corner kebab or taco place seems like an unequivocal positive for society, I have no complaints about their existence at all. I feel like most people eating at corner shops for half of their meals is pretty much ideal--if it's affordable to do so then it is a very sensible and economically positive division of labor. On the condition that the food be of decent quality, of course. Which sometimes it is. Perhaps not as much as it should be though, but people do have standards and will pick the better places.