Hugh,
Concerning your request for information, I have never had issues with Velcro on my dive gear. (It’s found on Buoyancy Compensator pockets mostly.) However, on tactical gear, snaps or magnetic clasps are the most silent and easiest to use without issue. With Velcro there is always the possibility that a second, third, or fourth “tear” will be needed if all the hooks haven’t disengaged. With snaps or magnets, it’s far easier and undeniably quieter. If I’m changing mags in a hot zone, the last thing I want to telegraph is my current position by a “riippp” of the Velcro releasing. – J.D.