Beyond the Allness of the All | Discussion

A Dhamma Discussion based on the question... "if thinking of samsara as a process or activity; is nibanna the only process or possibility other than samsara? I'm trying to understand nibanna and whether it is an eternal, unchanging state of peaceful existence, or an eternal state of nothingness. If it's not either of these things, what else is it? And specifically, I'm trying to make sense of what happens to an arahant after death of the body."