the more important part is how firm the midsoles are. if they are firm and not dry you should be fine. if they are soft or feel weak then you might want tojust wear them around the house fist to see if they crack......
never wearin is worse than wearin at least couple times a month
i heard from someone that not wearing fastens the aging of sole and eventually the cracks will get worse
i dont remember exactly why but i think certain amount of pressure applied to the sole keeps it in shape