I’ve always wished Markdown was better supported in email. I work with external companies’ APIs a lot where email is the medium, and typically I use a Windows monospace font for code snippets (I’m on macOS but there are a handful of monospaced fonts that work on both).

It’s very clunky, and I wish the backtick notation would work out of the box. Whoever decided HTML in email was the way to go should be shot.