Sunny Aggarwal, the co-founder of the Cosmos-based Osmosis exchange, explained to CoinDesk, “Almost every rollup platform right now is all single operator – whether it’s Arbitrum, Optimism or StarkWare.” In other words, one company or computer, rather than a distributed network of node operators, is responsible for bundling up the transactions that eventually get passed down from the layer 2 chain to the mainnet.
Source: https://www.coindesk.com/layer2/2022/06/29/a-major-crypto-exchange-abandons-ethereum-is-the-worlds-computer-falling-behind/?utm_medium=referral&utm_source=rss&utm_campaign=headlines