How Often Do APIs Change?

Dan: How many API providers do you know that promise no breaking changes? Or we're going to support this API indefinitely? I'm curious, especially in your experience, Joyce, since I haven't done a ton of this, how often do those change? Where somebody does close off one endpoint and open up another one or things like that. Because they upgraded their app and they didn't make a contract that said, this will continue to work until the state.