ERC-4626 is the standard the whole of onchain yield converged on: one audited interface for tokenized vaults that MetaMorpho, Yearn, Aave's wrapped deposit tokens, Fluid, sDAI, sUSDe, and sfrxETH all speak, so a share in any of them is the same legible, redeemable claim on an underlying asset.

The standard earns its ubiquity by being exact. A vault must publish what it holds, what a share converts to, and how much more it will accept, and every conversion can be previewed onchain before a single token moves. The share price is not a marketing number; it is the ratio of assets to shares the contract enforces at deposit and redemption, block by block, the same for everyone. That precision is why lending markets, treasuries, and solvers all treat 4626 vaults as interchangeable parts.

The standard made vaults legible; it did not make anyone watch them. The rate that drew the deposit decays while the position sits. The better vault opens across town and fills its cap before the weekend. The share price drifts against the underlying in a way you only notice quarterly. Rotating yield across vaults is a job measured in open tabs and spreadsheets, and every day of delay is spread handed back.

Every number a 4626 vault publishes is a step in a plug: the share price, the total assets behind it, the remaining capacity, the exact conversion between shares and assets in either direction. Deposits, mints, withdrawals, and redemptions run when a condition is met rather than when a person is awake, across every vault that speaks the standard at once.

Idle balances deposited the block they land. A position rotated the moment another vault's rate justifies the gas. A deposit that catches a capacity opening at whatever hour it happens. A redemption triggered by the share price, not by the news.

Vaults were standardized precisely so machines could treat them uniformly. The capital that earns the most across them already moves by rule, and a deposit that waits for a human to compare rates is paying for that patience in basis points.