Originally Posted by Dr.
I still go back to this foundational principle: Superman was conceived as a dashing, romantic, “cool” hero. S&S weren’t going for laughs or doing satire; in their minds, the classic Supes costume was supposed to be impressive, imposing and worthy of a larger-than-life champion. In other words, the costume is merely a representation or symbol for a larger concept. So if, over the course of time, some elements of the costume (e.g., the trunks) become (for whatever reason) stigmatized, you alter them - because the first duty is to the concept and not the superficial details.
That's a very cerebral yet accurate way at looking at changes in comics characters as a whole, but is there still really a need to eliminate the trunks as this no trunks debate never really picked up steam until Cavill's suit debuted/the new 52 BS happened? Granted, no trunks may be better for the design they went with but not overall. I mean if Superman suddenly had a pompadour how many people would like the idea?