> which seems like a really clumsy way to handle it. In most real cases, wouldn't you write the From impls for the specific types of errors you're expecting?

In an application, yes. The problem is in libraries because the `From`s` are public so you have put the error type for your dependency in your public API and if you change dependencies or upgrade past a major, you've broken your API. Granted, it is unlikely someone is going to use it ... but I wouldn't put it past people to take shortcuts like that.