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That's not really true in practice. Often you just end up with a massive Error variant type that's used everywhere, even when the specific function you're calling could only return one of them.


You don't have to have Error variants if you don't care about their type.

You cannot catch a StackOverflowException or an OutOfMemoryException. All you do is log it & restart the app.

Once could split it into retryable errors and non-retryable ones. Like a DB disconnect, that can be retried.

BUT to be fair, that's not logic that belongs in the business.




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