The problem right now is that "has only been witnessed in vitro – that is, under artificial conditions in the laboratory, and not inside cells." which means it may not even exist in our bodies.
Edit: For clarity - all the in cell work is cultured cell lines and not cells taken from an animal model or in situ imaging.
Literally my only point was that 'this might not matter for biology because we've not even seen it in cells' is no longer true. It still might not matter for biology though!