You are absolutely wrong. Before 14w30x hopeprs worked outside the worldborder. Currently this relates to hoppers not accepting items but still giving them, you can test this by putting a hopper on top of a chest and then making the worldborder smaller then trying to throw an item in. Redstone clocks also work outside the worldborder. Don't talk about what you do not know.
If its a dupe can someone please assign the issue to someone so that it gets resolved?