STETH after Shanghai

That’s a notch more nuanced, so correct answer “in most scenarios barring really catastrophic ones 1 stETH = 1 ETH on withdrawal”. Would also note the timing for withdrawals — in proposed design those are processed during Oracle report, so ~ once a day; in some cases the fulfilment of the request may take longer. For full picture look into design doc: Withdrawals for Lido on Ethereum