Yeah, I've noticed how hot of a potato this is in the Superman-forum, and how many do not feel that Superman's costume should ever change to any greater extent.
One of the biggest parts of that, appears to be the trunks - originally inspired by 1920's-1930's strongmen-performers, the athletic trunks was eventually a mainstay among professional wrestling, until the 1960's when they started to get subverted and replaced by other sports-wear.
They however, remained a part of both Superman and Batman's costumes, until the 1980's-1990's, when Batman first started deviating from the look, going back and forth between a trunkless and trunk-ified look for some time - until the New-52, when the trunks where definitely dropped on Batman, and he has yet to go back.
The same also happened to Superman, but to a great uproar, as many felt this ruined a classic design which should never have been touched.
However... you, the bat-fans, did NOT have the same reaction to Batman definitively dropping the trunks.
But why is that? Is it because Batman have been trunkless or went back and forth for close to 25 years now? Is that a part of it? Were you simply desentized to Batman losing the trunks, because of this? Or do you view Batman's costume as DIFFERENT in basic design to Superman's? Even though the two are obviously IMMENSELY similar?
I also note how fewer of you seems to have a problem with the SYMBOL on Batman's chest changing almost NON-STOP..! Although the yellow oval has returned now and then, it is often subsumed, by various variations to the original, all-black symbol of Batman's. Yet the yellow oval remains the most marketable and recognizable of the bat-symbols, and is the definitive favourite among merchandise.
Why does Bat-fans have a different relationship to Batman's costume than the super-fans have to Superman's costume?
I myself, would hypothesize that the true difference lies in that which signifies BATMAN, is neither the symbol on the chest, nor the trunks / colour-symmetry of the body-suit, but rather, what signifies classic Batman, is the CAPE AND COWL!!
What do you say, Bat-fans? Am I right?