Lab Rat Longevity

Sima, a female Sprague-Dawley rat, has achieved a record age of 47 months (https://www.theguardian.com/science/2023/feb/08/anti-ageing-scientists-extend-lifespan-of-oldest-living-lab-rat). Sima is the last of a group given frequent transfusions of plasma from younger rats, to see if this extended their lives. Although the transfusions appear to have enabled the rat to attain really old age, I can't see this as a viable means of banishing the effects of time. It's more likely, I suspect, to result in some rich folk undergoing expensive, but unnecessary, tranfusions in profit-orientated private clinics.