When a key person leaves, they take a map with them. Why a customer churned two years ago. Which vendor relationship is fragile. What was really decided in the meeting that the notes summarized in one line. None of it is written down anywhere you can find.
This is the quiet tax on every growing company: the same context gets rediscovered, the same mistakes get repeated, because the memory was never institutional. It was personal, and it left.
Signal turns that personal memory into an organizational asset that compounds. The context stays, searchable and sourced, no matter who comes or goes.