[blueline]

meh, i think the timescale doesn't work out for this to be the case for sneakers.

the only sorts of sneakers i can think of that are sought after where a huge portion of them have disintegrating soles are like 1985 original Jordan 1s and to a much lesser extent some of the original pairs of the next few models (2s, 3s, 4s)

there is definitely big importance placed on condition in the collector community, but for the vast majority of it comes down to whether the shoe was worn at all, not whether it's literally crumbling into pieces from age.

now that the market for this stuff is so huge, maybe another 10-15 years down the line you'll be spot on though.