Silver didn't like himself sometimes; being near-immortal and not really finding anything new about himself wasn't always a barrel of laughs.
He won't go back in time to reverse the procedure. He knows what happens when you try. Others have tried, though... not everyone is a big fan of Silver, including some folks with time machines and a lot of time. They'd love to see him off the scene. Operation Universifix went from 70ish to 90% coverage around the timebubble he joined. They're at a steady 98% now. They still can't get any coverage around the beginning of the timeiverse: they're waiting for another hero.
They've had many heroes come and go. They're all still around, in a way. You can catch them in their future missions. The old protocol says you can visit anyone on their future missions, past missions, anywhere - as long as you don't say a word about what gets them in the end.
But really, it makes no difference - they can see it in your eyes. They know you know. And they wouldn't l

My favourite stories happen on other planets
where adventurers have left space,
and spend their days and centuries watching the trees and clouds. Using their godly powers to do things like warm up drinks.
Also, ideally there'd be robots, and the odd laser fight. And time travelling.
Gotta make the most of time, after all.
But that's
not what's happening.
It's just you and me.
Dicking around.
Buying apples. Boozing.
Writing about it.