Ethereum's much-anticipated Dencun upgrade was completed this week.
Dencun will introduce the process of Proto-Danksharding, something long theorized (it was first mentioned by Buterin in 2019) which changes how Ethereum stores data. Instead of keeping all data directly on the Ethereum mainnet’s immutable execution layer, which is expensive and computationally heavy, Dencun will introduce a new, temporary way of storing “blobs” of data, which is cheaper. 
https://video.nostr.build/6b4d08e712165000923cba789ed1dc6afa1bd69a1cd39dcff747d42e965c95ae.mp4
https://cryptodaily.blob.core.windows.net/space/ethereum%20dencun%201920%201.jpeg