Blockchains that want to serve the banks and the enterprise often fear the halting and the congestion issues. Solana suffered a lot. And so they started offering the private chains on the side to the main chains.

Ethereum too has plenty of such customers who want to bring the enterprise data and transaction with Wallstreet Banks.

Here the transactions from the enterprise and institution would be sent through their own pool and screening. This way the transactions would be screened in the enterprise ledger which makes focused chain scaled for the private entities without having to leave chain.

So no need for the private chains but rather private pools within the Ethereum. In the grand scheme you can see how that would help with the Ethereum based enterprises who want to scale on the chain.

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