[shkkmo]

> No one cares that JohnFen choses to not render them as HTML.

Many people care. If you aren't including a plain text version of your email, you aren't following email best practices.

[TheOtherHobbes]

If people care it's not because of an RFC from 30 years ago, it's because marketers have recently started to notice that plain text can sometimes cut through in a way that HTML doesn't.

Sometimes being the word.

Most corporate email will continue to be HTML for the foreseeable. There's no point expecting it to be anything else, because it just won't be.