In The Incredibles, Edna Mode has a strong stance against capes on superheroes because of the multiple untimely deaths directly caused by capes.
What I can't seem to figure out is if Edna actually designed capes into the costumes and learned from her mistakes, or if that was a mistake made by others that she wanted to avoid.
I ask this because I've run across several people looking into her line:
Edna: "I never look back, dahling! It distracts from the now."
as a kind of joke or commentary about how headstrong she is for designing suits after her mistakes effectively killed at least six heroes.