PEERDAS: HOW FUSAKA MAKES L2S CHEAPER

Summary from the TLDR Crypto newsletter

Fusaka's main feature, PeerDAS, changes how Ethereum stores blob data. Instead of every node keeping full copies of each blob, nodes only store a small slice of every blob while still being able to verify that the full data exists. That means the network can safely handle many more blobs per block, which lowers data-availability costs for rollups. More blobs per block means cheaper L2 data and cheaper L2 transactions for users.