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Vaults didn’t become the standard in #DeFI by accident.
Before ERC-4626, DeFi vaults existed but they were fragmented, inconsistent, and fragile. ERC-4626 introduced a shared vault framework that made DeFi safer, more composable, and more accessible.
Today, it underpins the Vault Era and forms the foundation of Concrete vaults, delivering one-click, institutional-grade DeFi.
The Problem Before ERC-4626
Early DeFi vaults solved yield aggregation, but at a cost.
• Every protocol implemented custom vault logic
• Deposits and withdrawals behaved differently everywhere
• Integrations were brittle and protocol-specific
• User experience was inconsistent and confusing
• More bespoke code meant more bugs, more risk
For developers, integrating with multiple vaults meant learning and maintaining dozens of unique interfaces. For users and institutions, this translated into uncertainty, operational risk, and a steep learning curve.

ERC-4626, in Plain Language
ERC-4626 is a standard for tokenized vaults that makes earning yield through vaults consistent, safer, and easier to integrate across DeFi.
Meaning it defines how vaults accept deposits, issue shares, report value, and handle withdrawals using predictable, audited interfaces.
In simple terms, ERC-4626 turns vaults into first-class DeFi building blocks.
$ETH
More deep dive on here : ERC-4626 [ https://1809bug.medium.com/erc-4626-d1bb9359578c ]