> It is reasonable to demand time to upgrade, so that there are no > interoperability problems. It is not reasonable to demand that this > 7-bit garbage be allowed to remain on the network forever, at the > expense of all future implementors and users.
forever is a long time. and yet, even if all use of quoted-printable were to cease today, there would still be a need for new MUAs to be able to read old messages stored on servers for many more years, perhaps decades. using raw utf-8 in message headers wouldn't replace 2047. instead, it would add yet another format that MUAs are expected to parse and display. it would not reduce complexity, it would add to it. Keith