Back when me and my brother were attending community college (2013-2014), McDonald's was serving 4 different types of McChicken sandwiches; my personal favorite was the Bacon Ranch & Cheddar one. Oddly enough, even though they were discontinued, the McChicken wrapper still has the names of the variants printed on it.
I just heard a documentary about social classes and said that people from the lowest classes (Like me) statistically won't "upgrade" to higher classes during their whole life and, if they even manage to accomplish such a extreme feat, they won't even be able to keep that class forever since statistically they're predetermined to be tossed back to their low class or worse by society. And that there were many researchs all over the world that proved this theory. except in European countries like Norway, where the differences between social classes weren't that sharp.