I recently realized that, even though I changed my username a while ago (more than six months), some of my old community wiki answers are still displaying the wrong username.
We are now 9 years later and I do believe it's time for SE Inc to re-think this.
I know SE Inc is trying to be more inclusive and that the new Code of Conduct is part of it. That's why I believe not deadnaming users should be something they would like to do too.
I am (mostly) fine with old comments deadnaming me. However, seeing the "wiki thing" doing the same things isn't as nice. Especially since old answers of mine do use my updated username.
To be clear, I don't like seeing my old username in comments. But I can understand that changing that would cost a lot. And, anyway, since comments are supposed to be temporary, I can always flag to delete them.
Also, there is a reason for the fact I changed my username and I don't want to attract unnecessary attention about this several months later. So, just "editing all my old wiki answers" isn't really an option for me (not one I like, anyway).