The main difference between MakerDAO/DAI and Luna/UST is that Maker doesn't accept their native token as collateral. You have to use collaterals external to the protocol which won't inflate in response to where DAI is relative to a $1 peg.
In contrast, UST only had LUNA as collateral, and ended up minting more and more LUNA as UST fell off it's peg.
That's not to say that DAI doen't have it's own risks as they have a lot of potentially censorable USDC as collateral, there could be situations where they can't liquidate borrowers fast enough if a collateral falls in USD price too fast, and they run their own oracles which could fail or misbehave. Not to mention the DAO has a fair amount of governance drama on a regular basis. But those risks are quite distinct from what took luna/ust down.
> Algorithmic stablecoins are not a good idea. See: Luna/Terra.
DAI is not an algorithmic stable coin. (1) While DAI is based on smart contracts it is backed by a mixture of other cryptos and stable coins (not Tether but USDC, IRC). If you really want to keep money in the form of stable coins please use either DAI or USDC and not Tether.
