Rather than write long boring emails, I write a bulleted point list of steps and I identify who should do what.
Everyone has an interface of services of what they can do or work on. Others can deploy those services.
And they are synchronized like gears.
Then the system has notifications on my
phone or an email-style interface where I can see tasks assigned to me.
When I do something you depend on, you are notified, and you are also given steps automatically that come from me.
Communication doesn't really scale, but expectations and work allocation does.
I can mutually command my boss, my colleagues.