Did you ever found out who the hacker was?
What was the result of your investigation?
Was there a police report?
How did make sure that the 10 million "stolen" PSB are not useable anymore?
Why did you come up with an "estimated" number of 10 million and not the exact number that was held in online wallet at the time of "hack"?
You initiated a swap with new PSB, are you sure none of those "stolen" PSB found its way back swapped to the new blockchain?