[throwawayqqq11]

Thank you. I was scanning this thread for anyone pointing this out.

The cooldown security scheme appears like some inverse "security by obscurity". Nobody could see a backdoor, therefor we can assume security. This scheme stands and falls with the assumed timelines. Once this assumption tumbles, picking a cooldown period becomes guess work. (Or another compliance box ticked.)

On the other side, the assumption can very well be sound, maybe ~90% of future backdoors can be mitigated by it. But who can tell. This looks like the survivorship bias, because we are making decisions based on the cases we found.