The Mike Ash blog post linked near the top of this one is IMO more interesting: https://www.mikeash.com/pyblog/friday-qa-2015-07-17-when-to-use-swift-structs-an

The Mike Ash blog post linked near the top of this one is IMO more interesting: https://www.mikeash.com/pyblog/friday-qa-2015-07-17-when-to-use-swift-structs-and-classes.html https://www.mikeash.com/pyblog/friday-qa-2015-07-17-when-to-... The title also matches the submission better. Maybe this was the intended submission?