It depends. More reputable contracts such as Uniswap and Compound use immutable contracts. This is how Ethereum was designed to be used. Unfortunately, many oth

It depends. More reputable contracts such as Uniswap and Compound use immutable contracts. This is how Ethereum was designed to be used. Unfortunately, many others use the "proxy pattern" which is a weird hack allowing the code to be replaced by an admin account. This makes sense for development, because it allows code to be deployed iteratively, but IMO it needs to stop.