For the love of God stop buying steel rifle plates. [Insert typical arguments here.] If you really want to hang your hat on the increased longevity, remind yourself It's a near certitude in being hit 20 times, you're either gonna become a vegetable, shit in a colostomy bag for life, become some cronenberg monster, or just straight up die anyway. No one cares your embodiment of the welfare state plate carrier can stop 500 rounds. 11x14" isn't that big, you yourself might be able to take 1 hit. In the off chance you get hit center mass and can keep fighting, it might as well be soaked up by something better at its job in more metrics.

Neither steel or ceramic will help you.

All warfare will be FPV drones or a 40mm dropped from a drone to directly blow up your head.