First, some background: Blob TXs were introduced by EIP-4844 in the Dencun upgrade and brought data availability (DA) fees paid by rollup users down by >100x May’s Pectra upgrade doubled the blob target/block from 3 to 6, which opened up much needed throughput for rollups Fusaka will allow Ethereum to ramp up to a target of up to 48 blobs/block on a scheduled and safe basis via PeerDAS and BPO hardforks