Every once in awhile I have seen folks in the airport with the boarding jackets. Always though they were a waste of paper. Figure the main reason they kept them in some cases is they sold advertising on them. I hated having to throw them out on each trip. Back when I checked bags, they did staple them to the jacket.

Even if I have a paper boarding pass (rare these days) - I just put it in my pocket. Old boarding passes were always good as a bookmark. LOL!