I'm curious - surely there's still some single point that would let the rotor fly away? What does it mean that newer helicopters "doesn't have" this? I mean the rotor is attached? It's a single axel? There are scenarios where the rotor falls off?
On the older 'teetering head' designs like the Huey, you can bump the mast (rotor shaft) in aggressive nose overs or low g conditions which would also separate the rotors from the aircraft.
[0] https://aviation-safety.net/wikibase/wiki.php?id=213384
[1] https://en.wikipedia.org/wiki/CHC_Helikopter_Service_Flight_...