Since Arch Floe is an ABAP-stack-only solution, and since there is no PDF attachment, then the rendering of the e-mail is much faster than the rendering of an equivalent PDF output form. The resulting e-mail size is much smaller without the attachment, and so the data packet is smaller and the data storage requirement is reduced.
There are no firewall issues and the e-mail is faster to arrive into the recipient’s e-mail client: It is faster on both the server and the client sides.