Not exactly. "Neighbor nodes" have to share cryptology data with one another for verification. If you simply join a session and you inherent data from the old

Not exactly. "Neighbor nodes" have to share cryptology data with one another for verification. If you simply join a session and you inherent data from the old seat, how do you know that the data you are being handed is valid? You don't unless you rebuild the cryptology verification with your "neighbor nodes". The problem is the theory and documents kinda of just hand-waves inter-node communication as being "unconditionally secure", which in practice is difficult to obtain.