The trouble with throwing is that the compiler doesn't care if you catch. For any library that throws, I wrap that up in my adaptor layer with try catch and the

The trouble with throwing is that the compiler doesn't care if you catch. For any library that throws, I wrap that up in my adaptor layer with try catch and then return an Error upwards. That way in the rest of my domain I've got the compiler complaining if I'm not handling an error that is coming from below. I can be sure that when I'm handling an error it's not going to be something random from 2 layers down, because it was explicitly returned by the layer I'm calling. As in most things coding, you can accomplish the same thing with either approach, but I believe by returning an `| Error` there's a better chance for the compiler to catch a bug before I run the code.