Well, the point is not that "handle errors immediately" is bad. It's that "tuples are a poor way to do it". A Result type makes you handle errors immediately, b

Well, the point is not that "handle errors immediately" is bad. It's that "tuples are a poor way to do it". A Result type makes you handle errors immediately, but also precisely models what you need (i.e. you don't even get the choice to use an invalid returned value).