LOL, well is not so much that we care, it is that he is just fun to poke fun at.
That list is misleading since many times his name is used an an insult, and isn't really talking about him per-say.
I wouldn't care if no one ever mention him again here, heck the way his career is going, there isn't going to be anything to talk about anymore anyway.
His Krypton was reconned out already and replaced by the Birthright one, and someone told me at another board that the current Superman has started to remember things that only the Earth-1 Superman could have known, so Red Beard will be a non-factor soon if all goes the way it seems to be going.
to quote that post:
Actually...
Current Superman has indicated having flashbacks of pre-Crisis memories on several occasions.
He remembered Krypto, he remembered Muhammad Ali, he remembered meeting Earth-Prime Superboy. He had a flashback of pre-Crisis Zor-El and Allura -- as well as the cube shaped Bizarro World once. "Whatever Happened to the Man of Tomorrow" was indicated as a possible (but apparently unlikely) future for him in SUPERMAN/BATMAN. He was able to build an army of robot doubles. He built a giant key for his new fortress. His history of interaction with The Fourth World, Barry Allen, the JSA and much of the JLA is identical to his pre-Crisis history in the case of many stories. Heck, he recently fought Blackrock and remembered the old version, a character who had never appeared post-Crisis until that story.
The Pre-Crisis LSH hinted that he's the guy who inspired him to form when they showed up recently. Darkseid, who retains pre-Crisis memories, seems to regard him as the same guy. The Linear Men, who are aware of the first Crisis, said that Superman is the same guy, even when reality and history get mucked with. Mxyzptlk has made allusions to facing him pre-Crisis as if it's the same guy.