Ramen may still be somewhat of a novelty where I live, and I would not call it cheap. Though now that I put that into words, a decent burger anywhere is about the same price..
> and I would not call it cheap
It is compared to the cost of making an authentic ramen broth at home at the scale of feeding 2-4 people. Pho has a similar property. I've made homemade pho broth once and it was very hard work, fairly costly, and it resulted in something that was pretty good, but not comparable in quality or price to something I could have bought in a restaurant down the street. (admittedly typically also cheaper that ramen)
Ramen restaurants are definitely not cheap in the US. I hear they are in Japan, though.