Independence is the moat
Brief
Why the independent layer keeps winning as the models get better, not despite them.
This series has been building to one question, and it is the objection every honest reader has been holding since the first piece. If the frontier models keep getting better this fast, why does an independent security layer keep winning? Why not wait for the model that writes safe code and verifies its own work?
The trust argument , the cost argument , and the real intrusion all pointed the same direction, but they left the hardest question for last. Not why independence matters today, but why it keeps mattering as the models improve.
The answer is that independence is not a gap the models are closing. It is a property they structurally cannot have. And the specific advantages that make it real, the data, the breadth, the neutrality, all compound as generation accelerates.