What I've noticed is that System76 doesn't have as good of QA process compared to something like Linux Mint or Fedora. Not to say that it is bad but that's my personal experience.
I don't disagree with that. They're also a much smaller group so I think it just stands to reason.
But I do appreciate that they're taking chances (probably for the same reason). Cosmic is quite impressive already and a good alternative to Gnome/KDE/Cinnamon; better than the Pop Shell on Gnome.
I personally wouldn't leave in, "Edit: a word," but if I change the substance of a comment in any meaningful way I like to leave an edit to say what changed.
Particularly for when someone already replied to my comment or may already be replying to my comment. I would be afraid of accidentally trying to gaslight someone lol.