"snooze" an email for later action. you wonder why nobody's done it before.
But then we are in the Noddy Era of consumer software.
They did think of it before.
Go Corp Pen Point OS expected to move between networks so had a universal "outbox" to accumulate outgoing stuff to drop off when you got reconnected to a network
In about 1991.
Sounded like a good feature then.
Still does.
Now if only they can do something about Androids data incontinence....