Even 10-15 years ago, %90 of what the average person learned about food came from mass media ads. Now it's probably %90 social media. In this world, mass produced food is practically the definition of "unshareable" - there's not much interesting about something that's inherently common and such food usually isn't too photogenic. Like so many products on the internet, this is a world where "the long tail" of food products, restaurants and even recipes can thrive like never before.
More than anything, I think there's a healthy competitive dynamic going on - food is legitimately getting better. Yelp reviews give local restaurants equal footing with national brands. Restaurants of all stripes have to compete with their own consumers, who have easier access to good recipes (and greater incentive to cook).