Notion’s selection and undo/redo with multiplayer are pretty potato. Notion stores selection as grapheme indexes in a text property, so while it won’t lose selection if someone adds/removed characters from a text, your selection won’t make as much sense as one in Google Docs. Likewise with undo/redo or regular typing into the same field - it’s all last-write-wins updates.

On the other hand, Notion’s editor does a much better job with CJK input, Android, etc compared to Slate. Slate has a beautiful API design but its implementation suffers outside of ideal conditions.

Source: I built this: https://twitter.com/jitl/status/1483918085384028163?s=46&t=S...