The only difference between this and an attack is that the purpose was altruistic. It's one thing to shift to new/updated infrastructure, it's another to manipulate blockchain transactions. We just have to hope that Vitalik or whoever holds the most sway over Ethereum doesn't ever act in bad faith (in a way that may not be immediately discernable to others).
It’s increasingly hard for any person to have that much influence with so many different client implementations for Eth2, and the nodes will have to accept those changes, whereas Bitcoin is pretty much Bitcoin Core.
