> A selfie stick with a film camera would have truly been useless. You'd probably only get a photo of some random thing behind you, and only learn of your mistake a week later.
The way selfie sticks work, you holding it and the camera pointing back at you, they tend to put you nicely into the frame, even though you don't get to look at what you're taking a picture of. It's much much more accurate than holding a camera out with your arm.
So I'd say they'd be exactly useful with film cameras, because you're going to be reasonably sure to be in the picture.