I think Cap would "swear off" swearing because he realizes he's not only a soldier, and a hero, but also a role model for children...

I remember reading that Christopher Eccelston had more than a few reasons to dislike playing the Doctor in Doctor Who, but chief among them was the idea that now he was a role model, and he felt that living up to that responsibility was not something he was interested in.

Conversely, David Tennant was very careful to not drink or swear in public, and gave up smoking during his stint as the Doctor.  He felt like it was his obligation to present himself as a role model for children, and to be a good steward of the character, even off the set.

Modern/younger writers can't write anything without putting a million swears in. It's one of the reasons I prefer older fiction. It's not that the words "offend" me per se, it's just that it becomes monotonous.

The dingbats (that's what those symbols are called) drive me nuts. Older comics had them only very occasionally. Usually writers would come up with substitute words ("holy spit!" or "ever-lovin'") that might sound quaint or "cheesy" today but it meant that anyone could read them. I think that mainstream superheroes should be for all ages. Don't even get me started on the movies...

There was an instance in an X-Men comic during the Claremont/Byrne period where Wolverine was trying to wind up Professor X by addressing him with informal nicknames, until the professor had a thought balloon with a sort of scribble in it. Actually I didn't read it as a swear at the time, more of a "grumble" sound, but I guess that's what it was supposed to be. It was funny because it was unique.

I should re-read my Secret Empire but didn't Cap used to throw in some choice 'damns' and 'hells' under Englehart's pen when he was particularly stressed out? I figured the 'Cap doesn't swear' thing was something from the MCU (and dropped in Endgame).