My organization (100+ employees) would also love this option. I can't tell you the HOURS I waste on a monthly basis tracking down attachments that were not included in a reply and then later that reply is forwarded to me. Obviously because I'm farther down the chain the attachment is gone, and I have to email the originator to send the attachment so I can address the issue in the email.
This request is decades old. With all the changes to Outlook over those decades and all the inefficiencies added to MS Office/Windows one would think that the programmers would jump on this issue as it gives them a huge feather in their cap to finally give the masses what they want. FYI by inefficiencies I mean what used to take one click now takes 2, what took 2 now takes 3-4 and so on.