Byrne Superman was strong for that time, but unless you want to deny that strength feats have become ridiculously... well ridiculous, he's weak compared to what he has been written to be these days. He certainly didn't have planetary level strength back then. Not even close. It'd be great if they'd dial it back to those days instead of this solar system, galaxy, universal, multiversal levels of bullshit that they've been peddling to make up for the fact that most of the brilliant writers are retired or dead. Because next week El Franko with the tractor will leave you scratching your head, until it bleeds.