Compound's contribution to DeFi is foundational: algorithmic interest rates that adjust with utilisation, and the COMP distribution that started liquidity mining. Both are now standard everywhere. What Compound has not done is keep the market share those innovations created.
Why v3 is structurally safer
In a shared pool, every asset can be borrowed against every other, so a bad listing threatens all depositors. Compound III (Comet) allows only one borrowable asset per market — typically USDC or ETH — with other assets serving purely as collateral that cannot be borrowed. That single change eliminates a large class of contagion risk and makes the market's failure modes enumerable.
The 2021 distribution bug
A governance upgrade contained an error that distributed roughly $80m in COMP to users who should not have received it. No depositor funds were lost, but the protocol could not reverse it and spent weeks on governance workarounds. It is a lesson about upgrade review rather than about lending mechanics, and it cost the treasury real money.
Where it stands
Conservative parameters, well-documented governance, a long clean record on depositor safety, and liquidity well behind the leaders — which itself matters, because thin markets mean worse rates and harder liquidations.
Who should use it
Users who want the simplest possible lending structure with a long safety record, particularly on the specific markets where Compound's rates are competitive. For depth and coverage, Aave; for rates, Morpho.