Yup. One issue from long storage is that the fuel in solid fuel rockets can start to separate. Ryan McBeth did an explanation on a possible cause on that AA missile failure.
As you mentioned, some explosives also become unpredictable. The Takata airbags sending shrapnel into drivers faces comes to mind.
Not sure what’s scarier, a the sound of a little terror drone before an explosion. Or the silence, the feeling of security that there’s nothing on a recently cleared path and then seeing my mates vehicle blow up.