Just been gifted a Tumi/Ducati carry-on - I suppose my “retro” Samsonite did show some wear & tear, and I didn‘t have a key for a while, although last year I did find a Samsonite luggage key that worked just fine if I jiggled it.
At any rate my new bag has a TSA approved combination lock, which means when WN gate checks me now, my case will be locked