The stories of crumbling older retros and ogs never stop multipling. It is inevitable. Nontheless, I feel that shoe care plays its part. Darwin or somebody once said "Genetics loads the gun, enviornment pulls the trigger." (if you follow) I think silicia packs or whatever they are called or how they are spelled - are straight up bad for your shoes longevity. Years back on NikeTalk - these drying agent packets were at the top of the "how to take care of your sneakers" list along with vacuum sealing, temp. control, wearing them, etc. (and you do have to wear them, at least minimally with care 10-20 times spread out - but that is another topic.) Constantly these crumling stories, and how the effect is caused, in part, to the drying out of the glue, foam, plastic, etc. I never thought sucking the moisture out of your shoes was good for them. The 5, 6, 11 are all gonna yellow, don't feal bad, it is also inevitable. It is not worth the risk of damaging the shoe. I don't know if this practice even remains.