Meanwhile just before Final Crisis, Lex takes a break during a big ass fight, and he talks to Superman as if they're friends, and as if Superman is Clark Kent and Superman is not shocked or surprised. it was just two buds hanging. Maybe it's like with the Flash's Rogue's Gallery, they never go for the kill, and niether does the Flash... There are rules. Lex doesn't attack Clark's family, barely acknowledges that Clark is Kal-El and in return, Superman does not melt him in his sleep from orbit.
That was two reboots ago.
The situation reminded me of the While E. Coyotee Vs Sam the Sheep Dog cartoons with how after they finished trying to kill each other all day, they clocked out at 5 o'clock on a literal punchclock, then went out for a beer together.
Batman and the Joker in the killing Joke, less so.