Every productivity system built around email starts from the same premise: an empty inbox is a finished inbox. Archive it, file it, snooze it, and the anxiety goes with it.
That premise is wrong, and it has cost people an enormous number of hours.
The counting problem
An unread badge counts messages. It does not count decisions. A person with 240 unread newsletters and one unanswered contract has a smaller problem than someone with four unread messages, all of which are their manager asking for the same thing.
Emptying the folder treats those two people identically. It optimizes the number you can see instead of the thing you actually owe someone.
What we measured instead
When we watched people work through a heavy morning, the expensive part was never archiving. It was the reconstruction: opening a thread, scrolling back three weeks, remembering what had been promised, and only then deciding whether it needed a reply at all.
That reconstruction happened dozens of times a day, and almost none of it survived the tab close.
Sorting is a side effect
So Parrot categorizes on arrival, and it keeps the history attached to the sender rather than the thread. By the time a message reaches you, its label, its prior context, and a draft that already accounts for both are sitting there.
The inbox does empty out. But it empties because the decisions got cheap, not because you spent your morning being a filing clerk.
Parrot Mail