I use it daily. This convo went on back in the day, and Markdown support in clients won. That said, it depends on how you use it. I still think the headline # renders text too big in Amethyst, so I prefer bold instead. Either way, IMO Markdown in notes is essential (especially for long-form notes). 

 You also have an eye for design and some class.

Imagine all of the ALLCAPS TEXT now appearing as H1 or bold. 🙈