Thanks for adding this. I think I speak for everyone who voted on this feature in saying that we look forward to you folks rolling out more robust markdown support that can handle things that we couldn’t already do with keyboard shortcuts or the WSIWYG editor. Things like:
- Actual inline code
- Multi-line code
- Heading levels
- Quote blocks, etc.
Quote from @Marie:
“We do not share a product roadmap because we are unable to promise a timeline and we want to ensure that the features and updates we release are as well made as possible. We wouldn’t want to release a sub-par feature just to meet a deadline - quality is super important to us. So, while we can’t promise a timeline or specific features, we can promise that we take your feedback seriously and we are considering it alongside other customer feedback at Asana.”
I’m confident you folks will get this feature rolled out in a way that satisfies users in the near future. 
Edit: No idea when the “near future” is. We’re 3 months in with this pseduo-markdown and it’s still just as useless as it was in September.
Edit (2): We’re 18 months in and they still haven’t figured out how to leverage something like ProseMirror. 
Edit (3): 2022-11-01. Asana went with ProseMirror with their recent interpretation of markdown in the description area. While it’s not full markdown, it does support headings and section breaks now in addition to the other items they already supported like ordered lists, unordered lists, and inline code, bold, italics, strikethrough, etc. Not sure if/when they’ll support code blocks or quote blocks, but hopefully it’s on the horizon.