Email is harder than you think
blog.frontapp.com/2016/02/04/email-is-harder-than-you-thought
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
Two years ago, I started working on Front, a multiplayer version of Gmail. Today, I’m sharing thoughts on email, things I wish I had known at the time, but instead had to learn the hard way. If you’re thinking about innovating in the email space, hopefully it’ll help you too! This is the first in a series of articles on that topic.