Was watching this video by Comicstorian that was talking about whether characters should age and pass on the mantles to others.
They make a good case. Passing on mantles like Iron Man to Riri may have gone down better if Tony was aging out of being a superhero and trained Riri to take his place. I like the idea that eventually these heroes will retire for good or maybe die heroically (permanently) and let a new generation take over. I wouldn't them to age in real time, but definitely age instead of this suspended animation they're in now. It would be cool to see the Marvel landscape look completely different with new and different heroes 20 years from now.
What do you guys think?