A studio running 12 products has 12 sets of customer conversations, 12 dashboards, 12 sets of decisions in 12 different group chats. The operator is the only thing aware of all of it, and only partially.
A shared portfolio brain centralizes that. Not as a dump, as a structured substrate where each product has its own record, but the brain can reason across all of them. When the operator asks "are we seeing the same retention dip on Game 3 that we saw on App 7 last March?" the answer is one query, not three days of digging.
This is different from a wiki, a CRM, or a BI tool. It's the operating substrate of the company, not a passive store.