Simplicity for whom? I agree that on high traffic lists email should be kept to plain text, but for your daily business/social use it's far simple to format an

Simplicity for whom? I agree that on high traffic lists email should be kept to plain text, but for your daily business/social use it's far simple to format an email with html or rich text than it is to rely on ascii decorations for text markup, footnotes or any kind of table/diagram.