TL;DR The chain appears stable after 4844, with blocks propagating well to different sides of the network Block propagation times peak at 5 blobs rather than 6, this result is not what one should expect if all other things are held constant This is not the result of timing games by block builders, based on analysis of transaction fees, MEV, and the source of blocks (builders vs. solo stakers) For reasons not yet understood, blocks with 6 blobs appear to be less full than other blocks, which likely accounts for the difference in propagation time Layer 2s utilize a variety of strategies for posting blobs to Ethereum Introduction On March 13, 2024 Ethereum's Dencun hardfork went live, marking a significant step forward in Ethereum's rollup centric roadmap & providing massive scalability improvements for Ethereum Layer 2s. The most important change in Dencun was the introduction of EIP-4844 which introduces a new kind of transaction which accepts "blobs" of data, which are persisted and served by Ethereum consensus nodes for a short period of time. This provides about 100x more data availability for Layer 2s to store their data compared to call data. As a result, there are now multiple Layer 2s with sub-cent transaction fees.