Do you accept comic characters to grow up?

Comics we haven been reading since young face one obstacle. Do comics characters grow up along with us or stay forever the same in the timeless world? It is not easy to grow up. But it is not easy to stay young all the time. The recent Marvel's Venom have Flash Thompson, once the bully in Peter Parker's school is now a grew up, injured war hero. And of course Peter Parker no longer goes to school and he got married. It is kind of strange to see them grow up and they have to change environment. Imagine all the Archie characters graduate and move on into working life. Would the readers still accept that?