I agree, generally no.
I have taken old mags out of a family members gun cabinet ( 1911's )...and they were stored in the drawer of that cabinet for probably 20 yrs, loaded, before my aunt asked me to clean everything out of there...and they all ran fine. I think there were 6 mags in that drawer...and I took 2 of them apart ( no corrosion in them, it was very dry in house, very little humidity...) ..and all of them ran fine.