After reading your review, lack of tags and "Electron" were you biggest complaints against Typora. Typora is not a notes manger, and reviewing it for what it's not trying to be, is unfair. As for electron, despite the perception of being a hog, Typora's resource usage is about 150MB in RAM and 0.5% CPU when idle. I think your modern MacBook pro can trivially handle that.

In my opinion, Typora's advantages are:

1. WYSIWYG markdown. I don't believe iAWriter is WYSIWYG. While that's ok for developers, Typora is more widely usable.

2. Extensions: from Mermaid, LateX, sequence diagrams to code highlighting, to export to ePub (via Pandoc), Typora is a lot more versatile

3. Saves files as text (.md) and assets, easily searchable via OS. Highly portable

4. Cross platform (Mac, Windows, Linux)