Are 13X5 mob’s less frequent in hardware units? If so, why?
They don't exist (outside of support of CNAFR) because the personnel have been put in a protective status. It was like that before, then it wasn't, now it is again. Some individuals will still MOB because they a) volunteer or b) (the more common one) the unit itself is in need of a body so the billet (or squadron) is mobilized (See: HSC-8x, although it happens elsewhere, too).