Consulting work is sold in hours and outcomes. Time spent in the inbox is, almost always, neither. The thirty minutes a day you spend searching across mailboxes, replying from the wrong account, and re-reading threads you've already read is unbillable, and it adds up to a working week per quarter.
STAMP is built for the kind of person who has four engagements running concurrently. Each one has its own domain, its own steering committee, its own deck cadence. The inbox is the connective tissue, and most clients can't handle it gracefully.
The triage layer handles the priority question โ which seven of these forty-seven threads do I have to handle today? The unified layer handles the account question โ which engagement does this thread belong to, and which alias do I reply from?