Blobs are part of the chain just like calldata is.

Today (or rather, this week), default nodes store blobs temporarily, but with EIP 4444 calldata is going to get the same treatment.

The endgame has for a long time been: all nodes do real-time validation; p2p networks store history.

Storage actively hinders blockchain's 1 actual unique feature - strict global consensus

Once real-time strict global consensus is achieved, data should be yeeted off the chain ASAP (varies)

Non-consensus P2P networks far better at decentralized file storage than blockchain

Storage actively hinders blockchain's 1 actual unique feature - strict global consensus

Once real-time strict global consensus is achieved, data should be yeeted off the chain ASAP (varies)

Non-consensus P2P networks far better at decentralized file storage than blockchain

https://warpcast.com/vitalik.eth/0x5d931673

This is more or less what we do in HotShot consensus, nodes need to store data for a week at most, after that they can delete it.