Earlier quoted context omitted.
I'd like to see it standardized that HTML is not supported in e-mails. Email worked fine before HTML came along and all the good email is still HTML-free... in my experience, only robots use HTML.
While the vast majority of my correspondence is plain text formatted. I do think there's a place for markup. Something that can embed images, provide different formatting styling (bold, italics, underline, colours and perhaps even sizes). It's also nice having an option between serif, sans serif and monospaced typefaces. Then there's hyperlinks. If not like HTML anchor tags were the hypertext is independent to the de…
Well, there's the (IIRC) RFC-specified way to write URLs within '' pairs, e.g. https://news.ycombinator.com/> (interestingly, the HN URL-finder doesn't support that).