How many characters have died in such a time spann? Like is any of the original characters alive?
I have had to add a magical plant, which when processed, slows the aging process. I felt a bit harsh killing retired characters, so the rich and powerful tend to not age too much. Some players are fine with their characters to die off, but thats there choice.
Lastly we sometimes dust off old characters to deal with major problems or just for mainly RP type sessions.
It requires some investment to keep it up but it is really nice to meet ppl on a regular basis for other things than food or alcohol.