What do I think about biometric proof of personhood?

What do I think about biometric proof of personhood?

https://vitalik.eth.limo/general/2023/07/24/biometric.html

appreciate your thoughts. here's a few of mine:

it's personally important we don't remove people from the equation (ever), some combination of methods makes sense, not all bodies are the same (does this person have an iris), a person is a process not a fixed object (has this person died)

would like to see systems bordered to a region (trust assumptions leaning on trusting a mass population, not the whole universe but not a neighborhood either)