[PurpleRamen]

> I'm not sure why they all roll their own editor. Can't it be a plugin?

There are multiple reason, like editors having too much of their own baggage, or not being meant to be used as a foundation for a mature app. But I guess mainly it's a matter of licensing, and building your own editing-experience.

VS Code is for plaintext, while obsidian has deep rich-text-handling. It's probably not that easy to combine both flawless and still supporting all the plaintext-editing.