in our daily life we see so many products which do not die.
definately there is some reasons behind this. accrding to me that products r still existing bcoz for wht purposes they were introduced, that purposes r still existing n that products r still doing their job with very perfaction as compare of other compitetors which r avilble in market. may be the compitetors hv better nd new techniques in new time but that products still hv buyers bcoz of trust on that products n flexibility according to new time and market