https://whimsical.com/blog/building-the-whimsical-text-editor-part-1

https://whimsical.com/blog/building-the-whimsical-text-editor-part-2

Discussions

I like that you can add a discussion directly from the document without a second click.






I like their thread that there is only one level making it clearer to follow conversations:

I like their quote replies because you can reference a previous comment without branching the conversation, which, most of the time, is rude for the other participants.

Mentions

I like clear is the distinction between People and Files

I like how compact is the Block Bar

Permissions

And most and foremost, permissions are so simple!