IMHO this should not really stop the idea.If the proposal is to write the message in markdown and then send it as a multipart message where the text part is the markdown source and the HTML part is some HTML generated from it, then the only important...
That should not really be stopping the idea.If the idea is to let one write the markdown and automatically create a multipart message with a text part containing the markdown text and an HTML part containing the HTML generated from the markdown, then...
Just created an account on this community to propose that an option is provided to lock the url of pinned tabs. Found yours and actually at least two other entries about exactly the same thing (probably there are more)