Hi, English isn’t my mother tongue so I was asking myself that question since I first encounted a w/… Back then I was like: “What tf does ‘w slash’ stand for?” And when I found out I was like “How, why, and is it any intuitive?” But I never dared to ask that until now
It would make much more sense these days to simply leave the subject line intact then have the mail client display the “reply” or “forwarded” lingo on its own.
It’s a computer so it should be smart enough to know what’s happening by looking at the headers. I never understand when we make computers do stupid things instead of actually programming them to be smart. Otherwise what’s the point of using them?