All these approaches are fundamentally flawed. If there is a possibility for a jailbreak/escape, it will be found and used. Are we really back to the virus scanner days with the continuous arms race between guard tools and rogue code? Have we not learned anything?
every security layer is a race to the bottom if you frame it that way - we are still using firewalls, sandboxes, OS permissions etc.
perfect security doesn't exist, practical security does.