Am too from Europe, and never heard about it until last year when visiting my colleagues in LA and was taken to a In-n-out. It was packed and I agree that it’s tastier than Mcdonald’s. My colleagues were very surprised that I didn’t hear about that company because “everyone knows it”.
What they don’t understand (until explained) is that what we get in a European countries are just a small selection of big franchises (McDonald’s, Burger King, Starbucks etc) and maybe a handful of other ones. In America there are dozens and dozens of restaurant franchises where you can eat for weeks each time in a different fast food restaurant in the same city without going to the same place twice. This is what always amazes me as a European, that huge amount of choice of everything you can have there.
Even a ton of Americans wouldn't know In-n-Out. They only really recently started expanding a lot. Until a few years ago its was pretty much a Southern California only thing. There are no locations east of Texas, and even then there are only locations in the core triangle of Texas. If you're in El Paso or Corpus Christi or Amarillo or Lubbock or McAllen or Brownsville you're several hundred miles from the closest location despite there being many locations in Texas. There are zero in New Mexico, Oklahoma, Kansas, or Washington. All of New England is about a thousand miles from a location.
These people acting like "everone knows it" essentially have the same world view that the entire world that matters is Southern California.
What they don’t understand (until explained) is that what we get in a European countries are just a small selection of big franchises (McDonald’s, Burger King, Starbucks etc) and maybe a handful of other ones. In America there are dozens and dozens of restaurant franchises where you can eat for weeks each time in a different fast food restaurant in the same city without going to the same place twice. This is what always amazes me as a European, that huge amount of choice of everything you can have there.