I know there have been much discussion about this issue (Here, and here for example) and it was apparently concluded as a wanted feature by most users.
I disagree however and believe discourse has an ever growing community of users who are non “mailing list” users and have no interest at all of saving an archive of all discussions on their mail client. For our own community it is mostly an annoyance for most users.
It would be great to have an option to opt out of receiving email for my own replies (especially when I reply from my email anyway).
I am completely with @AstonJ’s opinion and suggestion as well as many others who have also commented on it.