It was extremely useful but also extremely ugly—a hard sell given that de Mestral mostly envisioned it being used on clothes. High-end designers wouldn’t touch the stuff. The only group that found it appealing was the burgeoning aerospace industry—astronauts didn’t want to fiddle with zippers and laces while trying to get in and out of their spacesuits, and they also needed a way to keep their various personal items and food from floating away in zero gravity.
They tried it with fashion..apparently too ugly..but not for space...
Unfortunately it was a major contributor to the Appolo 1 capsule fire. It became incendiary when exposed to pure oxygen and ignited from an electrical spark..