if its been stored properly,
without extremes in temps and such
dont see why it still wont be a good bow
if poundage can be adjusted, see if it can work for you,
if not, yes modern bows offer much higher letoff and maybe new is way to go,
but age shouldnt be a factor
my compound is 10 yrs old and have no plans to change it,
i recently dug up an old bow my dad had around +30 yrs ago,
even 30 yrs ago it was an old used bow, dont know exact age but its gotta be 30-50 yrs old,
a 25# bow that i plan on using for small game