???Yeah, I realize superman need's some limit's. Destroying a solar system by sneezing is a bit extreme, yet you say dragging planets through space is impossible, so they do that and characters like green lantern, wonder woman, and even weaker ones do the same thing so superman is a ....underman compared to them.I think superman should be able to move planets, even if it is with difficuly. If you want to depower supes, keep him the most powerful being on earth and weaken everyone else.It was okay with golden ages superman because back then the world was simpler. Then in comics there was no all powerful darkseid gods or super hydrogen bombs.
Superman get's stronger as we get stronger.
You make a really good point about Green Lantern or Wonder Woman dragging planets around. My argument isn't that Superman shouldn't be able to drag around planets, my argument is that
nobody should be strong enough to drag around planets. Including Wonder Woman, Supergirl, Power Girl, Green Lantern, Captain Atom, Hulk, Thor, Juggernaut... nobody* should be that strong.
I have no problem with scaling everyone else back when Superman is scaled back, in theory, but part of the reason to scale him back is so he can be hurt by super-villains, and if they're scaled back as much as he is, he can't be. You've got to have a balance.
The Silver Age Superman could have beat Doomsday without breaking a sweat. And that's boring. Scale him down. Maybe Superman can beat Doomsday, but he has to take the rest of the afternoon off to recover. That doesn't make him too weak, but it does make the fight more entertaining.
Of course, you can create that kind of tension with other people in danger instead of Superman, but it's harder to make people interested in "Those unnamed characters must be saved to honor Superman's oath to protect all life!" than "Superman might die himself!"
[*Except maybe Captain Marvel. He's off in a world of his own, a world not grounded by basic physics, because 1) he's more childish than Superman (though often just as entertaining), and 2) he's magic, and hard or even soft SF rules don't apply to him the way they apply to Big Blue.]