moore> I use mh, but I don't use message/external-body. It's not that
moore> the feature is a bad idea, it's that mh's user interface for it
moore> is too annoying to use.
You're using MH as your MUA and you are complaining about something
not having a user-friendly interface? B^)
MH is modular. Write your own or use a more user-friendly and modern
mailer... Don't bitch about possible new technology when you're using
software that hasn't been updated in multiple years.
For reference, I do use MH. I just don't bitch about its ugliness.