Well actually I take it as a realistic way of acknowledging that a characters stories and history. I don’t need the characters to age to death, but hey I buy at least most of Batman’s stories happened if he’s been Batman from his 20’s to his 40’s instead of just 5 years we got with new 52.
Use comic shenanigans to keep them young (time, magic, reality rewrite) but age to me helps make it believable that these heroes have been doing it for a while and are legends.