On 9 August 2023, at 12:00 Eastern, Coinbase opened Base mainnet to everyone. The company had previewed the network in February, given developers a July window, and used Optimism’s OP Stack — the same modular rollup software other teams use. More than a hundred apps and service providers were listed as live. “Onchain Summer” was the launch festival: mints, grants, a campaign. Fees on a quiet rollup are low. That is the product pitch.
Base is not Ethereum. It is a company-operated layer 2 that posts data to Ethereum and inherits the security story on the brochure from that settlement. Sequencer, bridge, and support culture are Coinbase’s and its partners’. Dencun’s blobs, which later made rollup data cheaper, are a 2024 story. Do not clone that piece onto this week.
What happened
Users can send ether and tokens on Base, use apps that deployed there, and withdraw through whatever bridge path the wallet shows. Withdraw paths are how people lose money on layer 2s: they pick the wrong network in a dropdown, or they do not wait for the full exit. A Coinbase account that “supports Base” is still a Coinbase account.
Why it matters
Public companies running rollups is a distribution fact. Cheap fees are a demand-and-capacity fact. Neither makes the base layer disappear. If you collect five new networks because they are free this week, you are collecting ways to mis-send assets. Pick one, send a tiny test, wait until the withdraw makes sense. See ethereum without the jargon. See how crypto wallets actually work.
What happens next
TVL screenshots, NFT weather, and a long argument about how decentralised a Coinbase sequencer will become. We will not turn a launch day into an ETH thesis. Nothing here is an instruction to bridge, mint, or hold anything on Base.
