None of mine have never fallen apart in the 5yrs I've owned them.
As far as the cables, I never let the cups spin…I lay them flat, pick them up, turn the drivers 90° inwards and place them on my head, after use I turn the drivers 90° outwards then lay them flat again…keeps the cables excellent!
I do the same. I don't like kinks in the cable. I even go as far to make sure that the contact point of the curvature of the cable inside the cups is in the center of the grill too. Hahaha Its part of my 'Grado routine'.