The Purge will introduce history expiration via EIP-4444 to limit the amount of historical data stored.
Ethereum co-founder Vitalik Buterin has shared the next steps for protocol simplification and node resource load decreases, known as the Purge.
The Purge is a key stage in the Ethereum transition that involves the removal of old and excess network history and simplifying the network over time.
Aside from reducing historical data storage, this stage also significantly lowers the hard disk requirements for node operators and the technical debt of the Ethereum protocol.
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Source: https://cointelegraph.com/news/vitalik-buterin-next-steps-ethereum-purge