Originally posted by ankur29
hmm in some comics it shows that CM ages, that Batman one where Cm works for luthor or summin, and in POS annual he's old like the wizardbut isn't BA like 5000 yrs old but still in his prime
too may inconsistencies
Billy is still alive at least in the 90th century. Thunder from the Reboot Legion got her powers from him then. I think he's still got the job in DC One Million too, hundreds of thousands of years after that.
I think looking old is just part of the job of being in charge of the rock- he has a grey hair now and he will still have grey hair in a million years. After all, a Marvel's body is based on an idealization of themselves. CM is Billy's image of himself as an adult, Mary likewise, and Freddies' is himself but healed.
Unlike Superman, where even in timelines where he lives uber-long people're surprised by it (it's not like every Kryptonian is still alive in DC 1 Mil, just him), the Marvels I believe have been explicitly called immortal while transformed.
Philosophía
Semi-immortal is underselling it. Superman is immortal in the truest sense of the world. In fact, you might say he is superior to most immortals, in the sense that he will actually outlive universes
To be fair, that may be a Crisis reference.