okkk..1st of all legendness isn"t based upon staying decades...there r soo many bands who just stay at 20 years & not legends...let"s take an example of GnR...only 1 cd ( appetite for destruction) is enough to made them legends....it"s not neceserry to stay at 20 years but do the 20 years task in only one cd!!!!.....history shows that only one cd have made legends ..legends..in bonjovi it was "keep the faith"...in def leppard it was "hysteria".....& system of A down is surly going to sucseed(if it don"t split)....