> My inbox is my to-do list. I email myself things that I need to do too.

I was vaguely aware that people do that. Why does that work for you, though? Surely one could take up the habit of maintaining a todo list with one of the million apps out there? Is it the "I have to do email anyways" or that it's all in one place?

> Unlike Slack, no one on email minds if you reply back a few days later.

I think that's a very underrated feature of email communication.