Hell yes! I always keep some on hand.
Old round wind up alarm clock, base broken away from clock body. Fixed.
Van rear view mirror that kept falling off the windshield. Tried super glue. Nope, fell off again in a few months. Tried the special glue for mirrors. It fell off again. Epoxied it, now still firmly attached to the windshield years later.
Rear facing dash cam, mounted to rear window on top of deicer wires. Cam mostly stays put, but falls off multiple times in winter when using rear window heat. No doubt due to strong temperature caused expansion and contraction cycles. A little epoxy, and now the cam mount is truly one with the vehicle.