You don't hear too much about it. You almost never notice it unless you're actually looking for it, unlike McDonald's with its ostentatious golden arches.
It's popularity is waning. But it's still everywhere. [0] There are a hundred other sandwich chains that have tried to do it better but none have managed the ubiquity of Subway.
People like to look down on it and espouse the alternatives, but when it comes down to it fast food can only ever be so good.
I guess that means that JavaScript is McDonald's?
[0] https://en.wikipedia.org/wiki/List_of_the_largest_fast_food_...