Vitalik Buterin's proposal lets nodes keep only data subsets relevant to users, sharply lowering storage demands

Quotes that support claims

The new model allows users to store only a subset of Ethereum’s data, making it feasible for everyday users to run nodes on personal devices.

As Ethereum scales and the gas limit increases, running a full node requires more storage and bandwidth. Buterin said partially stateless nodes address the issue by allowing users to verify the blockchain and serve local data, but only store a subset of the Ethereum state, based on the user’s needs.