There units been deployed they don't take it back
Velcro makes for easy promotion or in unit demotion if someone needs motivation
will admit...taking all your uniforms in to have the patches changed was a pain in the ass...….but no one complained when getting that promotion so guess it wasn't that big a deal....I was always proud of everyone of my promotions....I got them as fast as the army allowed you to get them....but fairly easy in combat to get them....not so stateside...….never knew of anyone who got a demotion...until I came stateside with big red...was going into a HDQ and guy outside with a trash bag...noticed he was obviously very *******.....then noticed his uniform....you could see where there was once Sgt. stripes but now had PFC stripes....so I just went about mu biz and didn't say anything to him
as for unit patches...in the seven years in the army I was only in three different units so didn't have to do those very often