I went on a mini rant on the Batman podcast we recorded last night...
I might be convinced if DC told me Bruce Wayne has always had a secret Lazarus Pit of his own hidden in the Batcave or the conscious-swapping machine that Scott Snyder invented in his run was always around and he just hopped from clone to clone. It would be easier to convince me that Superman and Wonder Woman age at a godlike slow rate because of who they are (basically gods). Hell, I could be convinced that the Flashes age at a super-slow rate due to their connection to the Speed Force (probably the easiest to convince me since the Speed Force helps them in healing, etc.). This Linearverse and Scott Snyder's Dark Multiverse and Metal crap is just downright stupid.
Sometimes, it's ok to leave stuff alone.