It’s about 1.1TB for full sync geth nodes, and growing. Ethereum researchers are looking into statelessness and state expiry which aim to make it even easier to run nodes with little need for space.
People will continue to run nodes regardless of the price of ETH, just like Bitcoin.
ENS is a smart contract protocol, so I don’t see how it’s related.
How many nodes will there be if ETH hits $0? What will happen to the services like ENS?
1. https://www.bitrates.com/guides/ethereum/how-many-ethereum-a...
Is the above accurate? Wikipedia says the whole network is 1TB, so that doesn't quite add up for me.