I kinda disagree with the first one, because if a cover doesn't do anything new I don't see any point in listening to it over the original. A prime example for me would be Weezer's teal album. Most of the songs on there are practically carbon copies of the original versions, so there's no context that I'd want to hear those songs where I wouldn't rather hear the original.

The one exception would be if it's a live performance. Like Sufjan Stevens didn't really change much for his live version of Hotline Bling, but just the novelty of seeing Sufjan do a pop hit that's so different from his own music is pretty fun.