tbh the theory Senku had probably was being slowly backed with Kaseki compents on feeling rejuvenated but now it's 100% confirmed and it's... good but also bad as fuck
it would be more than 7 billion people too because babies XDD but even if it's not for all 7 billion it could/would be used for just a few and that would also be bad
and if it's used on a few it would end being for those with more power and that's just nope, but on the other hand all the good that could be done, not keeping people alive forever but letting them reach a timely end due old age and not from sickness or murder... it is fascinating at the very least
merchandisingI mean maybe they're just weathered!