I think the main reason why the Beatles are still so popular is (a)nostalgia and (b) they aren't too nichy. And by "nichy" I mean a lot of people can appreciate their music without having an "aquired taste". Plus their style changed over time, so that's even more potential fans.
Although always saying that "The Beatles are the best band in the world period" is really stupid. Yeah they were influential, of that there is no doubt, but that doesn't make them "the best". Hitler Stalin (avoiding Godwin's law there, barely...) was very influential, doesn't mean that he was "the best" leader in the world. Plus you can't say that any one band was "the best". Music is subjective and people could absolutely hate the Beatles. I generally like my Rock and Metal on the harder side and the Beatles do not deliver on that. So I don't really listen to them that much. And although I do enjoy listening to some of their songs when I'm in the right mood, there aren't that many of them.
Although always saying that "The Beatles are the best band in the world period" is really stupid. Yeah they were influential, of that there is no doubt, but that doesn't make them "the best". Hitler Stalin (avoiding Godwin's law there, barely...) was very influential, doesn't mean that he was "the best" leader in the world. Plus you can't say that any one band was "the best". Music is subjective and people could absolutely hate the Beatles. I generally like my Rock and Metal on the harder side and the Beatles do not deliver on that. So I don't really listen to them that much. And although I do enjoy listening to some of their songs when I'm in the right mood, there aren't that many of them.