Thoughts on Base? The Coinbase L2 of Ethereum

I found out today that on Coinbase Wallet there's a campaign to bridge ETH into Base, so I decided to look a bit more into it...

From Coinbase's FAQ, on Base:

**What is Base?**Base is an Ethereum Layer 2 (L2) chain that offers a safe, low-cost, developer-friendly way to build on-chain. Base is an L2 built on OP Stack in collaboration with Optimism. We’re incubating Base inside of Coinbase, leveraging the last decade of our experience building crypto products, and plan to progressively decentralize the chain over time. We currently do not plan to issue a new network token.
Some of the highlights of Base are:
Secured by Ethereum: Base is built with the security and scalability you need to power your decentralized apps. It leverages the underlying security of Ethereum, along with Coinbase’s best practices, to enable you to confidently onramp into Base from Coinbase, Ethereum L1, and other interoperable chains.
Empowered by Coinbase: Base makes it easy to build decentralized apps with access to Coinbase’s products, users, and tools. Seamless Coinbase product integrations, easy fiat onramps, and powerful acquisition tools enable developers to serve the 110m verified users and $80B+ assets in the Coinbase ecosystem.
Big features, small fees: Base offers full EVM compatibility at a fraction of the cost and is committed to pushing forward the developer platform. Set up gasless transactions for your dapps with easy developer APIs for account abstraction, and securely build multichain applications with easy-to-use bridges.
Open source: Base aims to be decentralized, permissionless, and open to anyone with the vision of creating a standard, modular, rollup agnostic Superchain powered by Optimism. We’re joining Optimism as a Core Dev on the open source OP Stack, and working to create a thriving community of other developers.

I also find an enlightening tweet from Messari where it confirms many partnerships with Base, namely Aave, Uniswap, Balancer, Sushiswap, Hop (bridge), DIA (oracles), Synapse (bridge), Stargate (bridge), Wormhole (bridge), Synthetix, The Graph, ChainLink, Axelar, and a few more.

Who wants to dive deeper into it, their website is https://base.org/ and while the docs part is pretty overwhelming to me, my question remains:

How decentralised will be an L2 brought to place from an huge exchange like Coinbase? Shall we expect similarities to Binance Smart Chain and Binance (exchange)?

What are your thoughts on the legitimacy of Base as a reliable L2 on the long run?