I wouldn’t be surprised if/when one of the organs goes seriously on the blink that the others will shut down as well. That’s pretty common, esp for elderly folks.
To be so frail and to live so loong.
I won’t be a conspiracy theorist and say maybe she’s getting some treatments most can’t get.
She is likely just getting treated by the best.
RGB has immediate access to some of the best health care in the world. It’s no surprise that she has managed to survive so long. It reminds me of George Bush the elder. They marveled over his long life without noting that he had the type of health care that would catch all sorts of anomalies that would kill regular people.